Cabinet of Ministers Regulations No. 468 in 2004 (April 29. No 26 14. §) rules on the Latvian et seq of the LBN 016-03 "Būvakustik" Issued in accordance with article 2 of the law on construction of the fourth part 1. approve the Latvian et seq of the LBN 016-03 "Būvakustik" (hereinafter the LBN 016-03 et seq). 2. By 1 July 2004 in Latvia are not suitable for the former USSR the building rules and regulations II-12-77 Snips "Trokšņaizsardzīb". 3. Construction of the submitted for acceptance to 30 June 2004 and that technical solutions are compliant with the applicable period under the requirements of the law, a construction documentation processing according to the LBN 016-03 et seq requirements is not mandatory. 4. Ministry of the economy: in cooperation with the industry 4.1 standardization technical committees promote this provision required for the implementation of the national standard and the International Organization for Standardization standard adaptation;
4.2. issue methodological instructions et seq of the LBN 016-03. 5. Regulations shall enter into force by 1 July 2004. Informative reference to European Union directive rules included provisions deriving from Council of 21 December 1988 of Directive 89/106/EEC on the approximation of the laws, regulations and administrative provisions of the Member States relating to construction products. Prime Minister i. Emsis economic Minister j. lujans approved by Cabinet on 29 April 2004 the Regulation No 468 et seq of Latvia LBN 016-03 ' Būvakustik ' 1. General question 1., the following terms used in et seq: 1.1. early reverberation time EDT (s) — the reverberation time, determined by the sound of ray in the interval from 0 to-10 dB;
1.2. acoustical screen — a continuous barrier (construction, buildings or terrain item) that is placed directly in the path of sound from its source on the protected space and causes the sound waves diffraction;
1.3. the reduced level of index triecientrokšņ Ln, w (dB): size, design the delimiting triecientrokšņ isolation in the laboratory without sound bypass;
1.4. the reduced level of index triecientrokšņ L ' n, w (dB) — that is used in assessing the spread of triecientrokšņ building and construction of the delimiting triecientrokšņ insulation under real conditions to bypass the sound;
1.5. the reverberation time T (s), the period within which the sound source off sound pressure level decreases by 60 dB in the receiver. Its value is determined by sound ranging from Ray-5 dB up to-35 dB and assigned the T30;
1.6. the speech transmission index RESULT (%) — the sound of understandability score with such an evaluation scale: 1.6.1. less than 30% — bad;
1.6.2. from 30% to 45% – weak;
1.6.3. from 45% to 60% – satisfactory;
1.6.4. from 60% to 75%;
1.6.5.75% and above — from excellent;
1.7. the sound clarity parameter C80 (dB) — listener perceived early (80 ms) and late (after 80 ms) of the sound power of the period, describing the sound clarity of space points;
1.8. sound the air-sound (noise) from the sound source distribution in the environment through the air;
1.9. sound insulation the air index R ' w (dB) — that is used in assessing the building's internal sound insulation design of delimiting and describing the sound penetration through the delimiting it construction, as well as through the adjacent structures — through the bypass;
1.10. sound insulation Rw air index — size used when assessing the internal structure of the buildings delimiting sound insulation, and determined through laboratory measurements or calculations (does not include sound penetration through the bypass);
1.11. sound insulation index of R in the air ' tr, s, w (dB) — that is used in evaluating the sound insulation between rooms and external areas — external containment building design and its elements of sound insulation;
1.12. the structure-mechanical fluctuations that spreads the building structures and causing the sound in the air;
1.13. triecientroksn: structure, which spread and caused direct mechanical effects to the structure (for example, walking through the divisions and stairs);

1.14.3-d factor LF – listener oriented sound not perceived energy and direct sound energy for 80 ms period, which characterized the 3-d sound. 1.1. scope of the et seq 2. Et SEQ requirements apply to any meanings the buildings and building units throughout their functional cycle: prospecting, designing, construction, overhaul, reconstruction, restoration, expansion and pārprofilēšan. This et seq requirements are mandatory for all legal and natural persons. 3. the terms used in the et seq meets Cabinet of 31 august 1998, the Regulation No 337 "rules on the physical size of the units, their English names and writing" defined. 4. execution may et seq apply it to national requirements of the standards list by the recommendation of the Ministry of economy, non-profit limited liability company "Latvian standards" is published by the newspaper "Gazette" (applicable standards). 1.2. the objectives of the measures and Būvakustisk them implementation 4. Būvakustisk the main purpose of the measures is a human-friendly acoustic (sound) environment in buildings and building in General. This implementation uses the architectural and construction methods. 6. Būvakustisk measures include acoustical measures and acoustic quality improvement measures. Anti-noise measures include building acoustics, technical equipment (inženieriekārt) noise reduction and sound insulation. Their goal is to limit the noise level on the premises and in the territories. The acoustic quality improvement measures include optimal audibility and labskanīb to the provision of premises and outdoor recreation projects. 7. the implementation of the measures to Būvakustisk the necessary sound source for acoustical elements and acoustic environment parameters determined using measurements or calculations, to be conducted under the applicable standards and et seq requirements. 8. the marine acoustic (also electroacoustic in apskaņojam space) calculations, measurements and surveys shall be carried out by qualified experts from būvakustik. Būvakustik expert has qualified specialists with higher education and at least five years ' seniority who specialized in acoustics and būvakustik qualifications certify the Latvian Association of Akustiķ or akustiķ of the Member States of the European Union, the Organization of the licence or certificate issued. 9. building or project acoustic quality assessment or in cases of dispute, the client issuing the construction permit or other competent authority may require or organize the inspection of construction projects carried out by the būvakustik expert. Expertise take complete or incomplete object in the project documentation or building premises and structures. If necessary, use both methods at the same time. 2. Room Acoustics 2.1 total claims down 10 et seq key requirements building space and open-air entertainment constructions acoustic characteristics. Et seq to particularise and complement the Latvian et seq of the LBN 208-00 "public buildings and structures" and Latvian et seq of the LBN 211-98 "high-rise multi-family residential buildings ' requirements space acoustics. 11. Et SEQ does not apply to the production, technical and special-interest space (e.g., recording and broadcast studios, sound planning rooms, klausāmtelp), which is made of special acoustic requirements. 12. Room and open-air entertainment constructions acoustic characteristics must be maintained throughout the operation. 2.2. requirements for acoustic characteristics of acoustic Space 13 parameters that characterize the acoustic space, determined according to the applicable standards. The acoustic parameters are fixed and evaluated with the octave frequency bands for 125, 250, 500 vidusfrekvenc, 1000, 2000 and 4000 Hz. sound levels in rooms that are regulated by other laws and regulations which restrict the noise level in this section are not the premises mentioned. 14. General requirements of different function rooms, the listener area acoustic parameters defined in annex 1 of this et seq. The client, providing for the use of the premises of the building, have the right to specify the acoustic parameter values that differ from the requirements in annex 1, as well as provide additional parameters. If the parameter values are not specified and not mentioned in this annex 1 et seq, by agreement with the client determines the būvakustik of its qualified expert. 15. Space acoustics designed such that the maximum useful sound-level values do not exceed the value of the risk of hearing and in any area of the site of listeners than blakustrokšņ level not less than about 10 dB. Hearing and blakustrokšņ levels of risk determined in accordance with the laws and regulations governing the permissible noise levels, and the applicable standards. 16. Room acoustic parameters for existing buildings and open-air entertainment constructions are determined by the acoustic measurements or calculations, but projected or compensated premises and structures, using the calculations or acoustic modelling. Room acoustic parameters calculated using three-dimensional computer modelling, take into account the space surface sound absorbing and dissipating qualities. 17. special interest premises (for example, sound recording studios, broadcast studios, sound planning rooms, klausāmtelp, fixed the sound format movie theaters), the necessary parameters are determined by the acoustic space of the client (owner). 2.3. requirements for space shape and volume 18. Space provides the maximum steady (diffuse) the sound field by preventing the formation of concentration and stāvviļņ sound phenomena and providing optimal acoustic parameter values. The proportions of the space may be determined in accordance with this annex 2 et seq of the area shown in Figure 1. 19. the form of the chosen Space, helping to direct the sound Ray compensation with a move reflected sound energy, such as using special sound baffles in accordance with paragraph 24 of the et seq. The reflected sound energy must not cause interfering echo phenomenon. 20. Rooms and open-air entertainment constructions that do not further the electroacoustic apskaņošan fixed shall not place the listener further about: 20.1.17 m from the place of the audience, the speaker discusses and Chamber;
20.2.25 m from the stage Portal plane dramatic theatres;
20.3.30 m from the artist podestūr (podium) open-air entertainment constructions, with the exception of the stage for the choir, which has more than 50 members;
20.4.35 m from the stage Portal plane opera halls;
20.5.40 m of the Orchestra or choir area Center and Symphony choir music halls. 21. In rooms with regulated acoustic parameter values in the parts of the volume of the acoustic (space būvtilpum part, dominated by direct and reflected sound only and not cut off with sound insulating elements) of the ratio of the number of places (visitors and the total number of the performer) to such projects should not be less than: 21.1.3 m3 to the location of the premises with the electroacoustic-apskaņošan;
21.2.4 m3 to the place — in the classroom, Conference halls and dramatic theatres;
21.3.5 m3 to the place — as well as the universal, the people's House and opereš halls;
21.4.6 m3 on the site — an opera and chamber music halls;
21.5.7 m3 on the site — a symphonic music halls;
21.6.9 m3 to place — choral and organ music halls and churches. 2.4. The space of sound reflective and absorbing finish 22. From būvakustisk point of view, the elements making up the interior space is separated into sound absorbing (slāpējošo) and atstarojošo. Atstarojošo elements are divided into atstarojošo and izkliedētājo directed. Use this element to directly affect the room acoustic parameters. 23. Sound-reflecting elements and structures shall meet the following requirements: 23.1. average sound absorption coefficient is less than 0.1;
23.2. the surface of the mass is not less than 10 kg/m2;
23.3. directed reflective elements (retro-reflectors) meet the following requirements: 23.3.1. the surface area is greater than 3 m2;
23.3.2. the shorter edge to the longest is not less than 1:3;
23.3.3. they have a flat or radius of curvature, which is more than 5 m. 24. Dissipating atstarojošo elements (lenses) are expressed in 3D, providing sound dissipation limits specified in this annex 2 et seq figure 1. 25. Dissipating reflective elements (lenses) represents at least 20% of their surface area in which the acoustic parameters are regulated. The position of the element based on the room's Acoustic measurements or computer modelling results. 26. the absorbent Acoustic (sound suppressors) is finishing materials and special constructions that sound absorption coefficient is greater than 0.5 in at least one of the 13 et seq. referred to the frequency bands. Material and design of the sound absorption coefficient shall be determined and the evaluation shall be made to the law "on conformity assessment" in the order and in accordance with the applicable standards. 27. Depending on the sound energy absorbent nature of the transformation are divided into the following groups: 27.1. wool type and lightweight — sound energy turns into heat in these materials because the pores occurs air molecular friction, with a minimum thickness of the most effective sound absorption average-high frequency range;

27.2. spring-loaded membrane — energy transformation takes place due to the membrane resistance and quickly make the interlayer resistance press; These absorbents are effective in low and medium frequency range narrow band (1-2 octave);
27.3. volume-with different space resonator acoustic volume-related blakustilpum, niches and gaps, which the operating principle is based on the "spring-mass" motor model. Volume of the air and the neck represents the "spring-mass system that provides a certain absorption frequency. These absorbents mask selectively — it effectively bar usually does not exceed third octave;
27.4. combo — simultaneously uses multiple of 27.1 27.2 the et seq., and 27.3. absorbent referred to (e.g., pierced with wool plating type of absorbent fill). Absorbent characteristic listed higher values of the coefficient (0.6-0.9) in a wide frequency range (250 to 8000 Hz). 28. The acoustic absorbent spaces with regulated acoustic parameters are used only on the basis of room acoustic measurement or computer modelling results. Spaces which limited only maximum reverberation time values, referred to in this annex 1, et seq. If the parameters are not regulated in this section these conditions not be met. 2.5. Special requirements for certain types of facilities 29., conference rooms, auditoriums, dramatic Theatre halls and similar facilities provide a spoken sound clarity and audibility. If the premises are not in apskaņošan, the electroacoustic acoustic capacity does not exceed 2000 m3 (dramatic Theatre halls-3000 m3). Performers (orator) near the surface produces a sound reflecting. If necessary, in accordance with the calculation of absorbents, it deploys far end zone or side areas. The electroacoustic apskaņošan is used if the maximum distance between the speaker lines (the zone) to upstream locations of listeners is greater than 20 m. 30. Concert Halls of zones allowed the performer acoustic characteristics, which vary from listener area acoustic parameters: reverberation time T can be up to 30% less, but values and C80 greater than required by this annex 1, et seq. Artist area provides dispersed reflection, lens position in the vicinity of the artist. The concert hall, which is greater than 35 m, equipped with fixed in apskaņošan of electroacoustic systems. 31. to ensure the acoustic balance, an Opera Orchestra pit floor depth against the floor of the priekšskatuv is not more than 2.5 m, except in the translation of the floor. The orchestra pit floor and wall to ensure such a low frequency sound damping (cavity beneath the floor is greater than 0.5 m, behind paneling — greater than 0.1 m). Striking tools and metal brass groups allowed in part cover with priekšskatuv floor console. Orchestra pits, where technically feasible, in addition, the lens, but the floor sound, bass sound superabsorbent (100% absorbent). The pit floor area for each musician to the point of not less than 1.2 m2. Opera halls, whose length is greater than 30 m, equipped with fixed in apskaņošan of electroacoustic systems. 32. in determining the acoustic parameters of universal medicines (people's House also and great club drugs), uses the averages established for different types of performances. It might be constructed technological translation, the acoustic parameters for adjusting each function or some functions. Perhaps the following transformation: 32.1. premises form the elements of the transformation — and the details of the location or a change of steering angle, which makes it possible to change the reflectivity distribution Hall;
32.2. the volume of the space transforms the acoustic volume and volume change of the place of the Viewer, which are changed with the reverberation of the related parameters (T, ED and others);
32.3. finishing the transformation of a surface finishing shift during use, related to surface absorption coefficient and the influence on the structure and reflections reverberation processes. 33. the Universal Hall equipped with fixed electroacoustic system of the apskaņošan. 34. Cinemas and other electroacoustic in apskaņojam spaces (such as discos, dance halls) provide short reverberation time, while respecting the sound field of the difuzitāt. Specific requirements depending on the room type. Additional requirements for other groups of premises shall be determined in accordance with the applicable standards. 35. the cult spaces provide the reverberation time requirements with sufficient clarity in the sound. To implement these conditions need enough acoustic volume simultaneously with the early reflections. 36. Open-air entertainment constructions (such as open-air stage) provide a sufficient level of sound listeners at least 10 dB in the zone above the blakustrokšņ level, as well as controls the echo phenomenon, bringing outdoor recreation structures the acoustic parameters of such spaces is analogous to the parameters of functions under this annex 1, et seq. A very large sound source (such as a combined choir, Orchestra) in the absence of direct control of the sound in different locations of listeners, in view of the prevailing wind, terrain and the impact of plantations. 3. Sound insulation 3.1. Common requirements 37. building construction design and construction such that the areas around them indoors and ensure noise levels according to the requirements of the laws of the acoustic noise values permissible. Used in constructions and products that sound insulation properties provided the statutory requirements. In this section, certain structural and product characteristics: sound insulation, as well as in the air triecientrokšņ and struktūrtrokšņ insulation. 38. In assessing the structural and acoustic properties of the products, use the results of laboratory tests, but if these are not available, calculations, measurements or ready-made unfinished object and product technical specifications. To assess buildings and its dielectric properties of the individual items, use one of the following parameters: 38.1. sound insulation indexes in the air ' and ' tr R w R, s, w (dB);

38.2. triecientrokšņ reduced the level of the index L ' n, w (dB). 39. the structure of sound insulation characteristics and Acoustic measurements carried out according to the applicable standards. 40. this annex buildings 3 et seq of the internal structures of a certain boundaries of minimum sound insulation requirements. Local building regulations authorities may impose higher sound insulation requirements. 41. Building and built the design to structural and acoustic properties of construction would remain throughout life. 3.2. Sound insulation requirements for building internal structures 42. Predetermined boundaries the sound insulation values are sound insulation index R ' w and reduced the level of the index triecientrokšņ L ' n, w, set 3 and 4 et seq of this annex. The building's inner surface structures delimiting consists of this et seq 3 and 4 set out in annex sound insulation requirements: sound insulation the air index R ' w is not lower than the prescribed et seq 3 and 4 of this annex, but reduced the level of triecientrokšņ indices L ' n, w is not greater than those laid down by this et seq 3 and 4 in the annex. Index R ' w values is necessary sound insulation between rooms in the vertical and horizontal direction. Index L ' n, w indicates required triecientrokšņ insulation in all directions (vertical and horizontal direction and diagonal). Compliance with the triecientrokšņ requirements of the isolation rooms, where a floor surface area of at least 2.5 m2. 43. building internal structures delimiting sound insulation to such noise is not directly spread to adjacent buildings. Mine shaft and communication (such as ventilation shafts, pipes that go through the building) technical performance provides wall and ceiling sound insulation condition within the limits laid down in this et seq. 44. Isolation index value spaces other than those referred to in annex 3 of this et seq (such as production facilities), adopted pursuant to this annex 4 et seq of acoustic modes, choosing the best fit to a function of the space. If the designer uses this 4 et seq., the data referred to in annex to the construction plan, the choice argument. 45. The necessary sound insulation between rooms, in which the maximum sound levels exceeding 100 dB (for example, discos, dance halls, production facilities) or the permissible sound levels below 30 DBA (such as studying, planning rooms), determined using the calculations only. 3.3 sound insulation requirements for building external boundaries of structure 46. Sound insulation requirements external boundaries and design elements raised depending on the noise level in the surrounding area of the building and premises. External sound level is determined using measurements or calculations. Building areas and premises permissible noise level shall be determined in accordance with the laws and regulations of the acoustic noise values permissible. External design and delimiting elements sound insulation shall be assessed in accordance with the applicable standards. Outer containment structures sound insulation is considered sufficient if it provides protection against external indoor noise and surrounding area against the building's interior noise incurred. 47. External noise sources around existing buildings construction of external delimiting the necessary sound insulation can be approximated using this 5 et seq., and annex 6. The external design of the delimiting sound insulation the size is predetermined sound insulation index R ' 3, s, w, referred to in this annex 5 et seq. External noise levels Lp, eq, down 2 m from the outer containment structures, taking into account the reflections of it. If the outer containment structures include various elements that have different sound insulation (for example, a wall with a window or door), in accordance with annex 5 of this et seq specified sound insulation index refers to the total isolation of this design. Index R ' 3, s, w of correction applied in accordance with this annex 4 et seq according to external containment structures and floor area ratio. The external design of the delimiting sound insulation index of not less than 5 and 6 this et seq., which are listed in the annex. 48. The calculation of the external design of the delimiting sound isolation and choosing an individual external norobežojošo elements, taking account of their sound insulation index of R ' w and Rw. Approximately 3 w, a, s, R ' = R ' w, where R ' w, res, res is the total external containment structures sound insulation, which is determined according to the design of the outer containment elements individual sound insulation index of R ' w and Rw. 49. In rooms where the floor area is 25 m2 sound insulation of the window is determined by using the zoom method: from index R ' 3, s, w value, determined in accordance with this 5 et seq., and annex 6, subtract the size 10 lg S/Sa, where S is the area of the outer containment structures and Sa-window (door). If the window take up more than 50% of the exterior wall area, sound insulation window size is equal to the external containment structures sound insulation index. Zoom method applies heavy exterior wall materials (such as concrete, masonry). Light multi-layer materials, weighing less than 100 kg/m2, as well as larger rooms where the floor area is more than 25 m2, zoom method does not apply. 50. Ensuring external delimiting structural needs sound insulation, followed by ventilation provided elements (such as ventilated openings in the construction of the window or wall) does not reduce the sound insulation of the structure so that the room penetrating the noise level exceeds the tolerable. To the noisy places in existing rooms ensure a very low noise level, ventilated rooms, with air conditioning equipment or supplies of fresh air through the air ducts of ventilation equipment. 51. If noise sources in the building (Interior) and the surrounding area are protected, the external design of the delimiting the necessary sound insulation is determined only by using calculations (5 and 6 this et seq. of the annex shall not be used). 3.4. Struktūrtrokšņ insulation 52. Taking into account the technical equipment noise level and position in relation to the premises where the noise levels are regulated, you may first need to take additional measures to limit the spread of struktūrtrokšņ. Additional measures need to be determined for each specific case. Technical characteristics of the noise of the machine is determined according to the standard, and thus the machine certificates. 53. it is not allowed to install the application generating structure-equipment room near where necessary to ensure calm. To reduce the structure, the pipelines that go through the design boundaries, set flexible casings or depreciation. Moving and rotating Assembly (for example, pumps, compressors, fans) assembled on the vibroizolator. Structure-assessed in accordance with paragraph 8 of this et seq and the applicable standards. Pumps and ventilation unit connections with the gaisavad (pipeline) system consists of flexible. 54. Water supply facilities are not allowed to assemble the walls bounded with other apartment accommodation or comparable rooms in public buildings, which must ensure silence. If the water supply facilities required, used only for Group 1 equipment, and construction of homogeneous wall mass is not less than 200 kg/m2. The water facility classification groups according to their sound pressure level shall be determined in accordance with the applicable Page standards. Easy design of multi-layer walls solution proves compliance with the trial. If you use 2. Group equipment, making the water supply Assembly building and Foundation, and the wall bordering the premises to ensure calm, take additional measures to reduce struktūrtrokšņ. Flow pressure in the system shall not exceed 0.3 MPa. 4. Technical equipment noise 55. Technical equipment are building technical communication (such as water supply and sanitation devices), heating systems, ventilation and cooling equipment, lifts and similar devices as well as devices that generate noise production, service and similar spaces. 56. Technical equipment sound pressure levels in rooms that it regulated, and the surrounding areas must not exceed the regulations on hygiene requirements. 57. Technical equipment the spread of noise reduction by būvakustisk and anti-noise measures, Assembly of equipment and communication process by providing a compliant sound insulation design of delimiting and using special equipment noise and vibrations from spreading: 57.1. installing the equipment sound insulation casing or covers;
57.2. installing anti-noise screens;
57.3. creating flexible connections;

57.4. with muffler, vibroizolator and vibroizolējoš in suspension. 58. special equipment necessary acoustic properties are determined by calculation and taking into account the noise source of the acoustic parameters and limits sound levels in rooms and areas. 5. Building Acoustics 5.1. Common requirements in This 59. et seq requirements complements the spatial planning requirements of for acoustical et seq, as well as specify the objectives and tasks of the design building in protection against noise. 5.2. Acoustic discomfort zone forecasting 60. Acoustic discomfort zones (noise protection zone) is the environmental areas exceeded the territory concerned as laid down in the laws and regulatory noise levels. The noise level of the environment is characterized by using the applicable standards specified in methods. 61. Acoustic discomfort zone boundary shall be determined separately for each 24-hour period, using the acoustic measurements or calculations in accordance with the relevant laws and regulations. Calculations carried out in accordance with the applicable standards. If running multiple sources or multiple buildings are affected, perform Acoustic measurements of the mesh or the situations three-dimensional computer modelling. Acoustic measurements can be performed periodically or use regular acoustic monitoring. 62. Acoustic discomfort zone calculations take into account the environmental and atmospheric conditions and parameters in accordance with applicable standards. 63. Acoustic discomfort zones may be located only in areas where building is allowed in the higher noise levels than found in the area or predicted. 64. Acoustic discomfort zones allowed the building of that external structures delimiting sound insulation provides appropriate sound levels indoors under this et seq, and other laws and regulations on the permissible sound level. 65. The acoustic discomfort zone boundaries can be reduced by designing and implementing an acoustical measures noise sources, the noise of the road or the protected object. 66. Acoustic discomfort zones determined and documented all the long-term external noise sources (such as transport lines, airports, aerodromes, production companies, crew, transformer substations) if their sound power levels exceeding 70 DBA, as well as the building of the internal noise sources, if it is external (2 m from the front) the equivalent noise levels exceed 45 DBA. 67. Aircraft noise zones shall be determined according to the applicable standards. 68. the production company noise power level (sound pressure levels for the evaluation environment) is determined according to the applicable standards. 5.3. Acoustical measures 69. Anti-noise measures first take the noise source, and they are: 69.1. noise source mode and operating margin of adjustment accurate;
EB 69.2. noise source replacement with acoustically less active analogue;
69.3. vibroizolācij noise source, thus reducing its acoustic emission;
69.4. noise source operating time limitation. 70. Acoustical noise propagation measures under way are as follows: 70.1. sound of the road, away from the noise of the protected object source or sources of the protected object;
70.2. sound insulation-noise source full separation from the environment through, for example, containment structures and covers, 2 et seq of this chapter;
70.3. sound shield-direct sound spreading restrictive barriers (for example, screen, buildings, terrain elements) the creation or exploitation;
43.7. the sound absorption and absorption-shielding measures (for example, areas of coverage, the plantation bar and an array of forest exploitation). 71. Anti-noise measures protected object are the following: 71.1. sound insulation: the protected object or room complete separation of noisy environment using a delimited structure, 2 et seq of this chapter;
71.2. architectural planning, protected area or the targeting of a quieter area. 72. A sound shield measures are acoustical screen — structures, buildings and terrain elements (such as the mound, dug). The acoustic efficiency of the screen are determined by measurements or calculations, in accordance with the applicable standards. The acoustic efficiency of the screen depends on the external dimensions, material and location, and it varies in different environmental areas behind the screen. If a protected building, located on the noise source on the other side, the screen surface facing the source of the noise, covered with sound absorbent material. The weight of the screen's surface must be not less than 30 kg/m2. Screen door, gate and passage of ensure adequate sound insulation. 73. The sound absorption and absorption-shielding measures are an area of the surface, which absorbs noise (such as grassland, agricultural land, scrubs, body bar and greenery greenery in the array). The acoustic efficiency is taken into account if they are exposed to throughout the year, not only the vegetation season. Acoustic effectiveness determined by measurement or calculation, in accordance with the applicable standards. Minister of Economic Affairs j. lujans annex 1 et seq of the Latvia LBN 016-03 "Būvakustik" (approved by Cabinet of Ministers of 29 April 2004 the Regulation No 468) comments. 1. FIND the values of the sound source to be a speech (or electroacoustic) State. 2. the value of the 3-d factor LF music source state space. 3. the tolerances of the table value is +/-5%. 4. Values correspond to rooms containing 70% of the expected visitors. * 125-250 Hz T values within the recommended increase of 10-20%, but 4000 Hz frequency, reduced by 5-10%. ** T 125-250 Hz the value limits adopted 500-2000 Hz 4000 Hz frequency band, but they reduce the levels of about 5-10%.
Minister of Economic Affairs j. lujans annex 2 et seq of the Latvia LBN 016-03 "Būvakustik" (approved by Cabinet of Ministers of 29 April 2004 the Regulation No 468) Economic Minister j. lujans annex 3 to the Latvian et seq LBN 016-03 "Būvakustik" (approved by Cabinet of Ministers of 29 April 2004 the Regulation No 468) sound insulation requirements for building internal structures no boundaries BC buildings and space type sound insulation requirements notes 1 2 3 4 i. residential buildings sound air insulation index R ' w (dB) 1. Between apartment living rooms 54 refers to all types of residential buildings Between 2 apartments for accommodation and office space for the sharing, 54 rooms are sharing the staircase, the lobby and corridors, as well as the attic and basement premises used 3.3.1 Between flats and premises containing noise sources with the maximum level: 80 DBA. 56 the ventilation Chamber, engine room, the garage's cafes, bars, shops, restaurants, gyms 3.2.81-90 DBA 66 3.3.91-100 DBA 76 4. Between one apartment premises 45 divisions between the rooms in two-story apartment, partitions between rooms and without the door between the kitchen and the room 5 5.1 5.2 the apartment entrance doors (the door system): open directly to the landing opens to the foyer, separate from the staircase to the wall. Triecientrokšņ-level 35 27 reduced index L ' n, w (dB) 6.54 Between apartments requirements not related to apartment bathroom, lavatories, sauna and similar premises 7. Between balcony stairwell, hallway, bathroom and loft apartment and 58 8. Between the space that contains the source of the noise 48 if necessary, carry out additional measures for a reduction of 9 struktūrtrokšņ. Between the two-story apartment accommodation short-term accommodation 63 II. Sound insulation in the home air index R ' w (dB) between the 10 dormitories (number) 52 temporary accommodation the accommodation is hotels , camping, guest houses, tourists and holiday home Between 11 (number) and the dormitories and shared spaces (the staircase, corridors, lobby, buffet) 52 12.12.1 12.2 12.3. Between the dormitory (number) and the premises containing the source of the noise to the maximum level: 80 DBA 81-90 91-100 dB dB. 56 66 76 kitchen, technical and staff rooms of cafes, bars, shops, restaurants, sports medicine 13. Between individual rooms rooms 44 14. Door or door assemblies between the dormitory (the number) and the staircase or sharing the Hall Triecientrokšņ level 32 reduced index L ' n, w (dB) 15. From one dormitory (the number of) the second 57 do not apply to the dormitory balcony, bathroom and toilet shared Between 16 rooms (balcony , staircase, Foyer, hallway, buffet) and sleeping (number) 55 17. Between the premises containing the noise source (technical service and maintenance, restaurant, kitchen facilities) and dormitory (the number of) 50 if necessary, take additional measures to reduce the prevalence of struktūrtrokšņ III. Social care and rehabilitation institutions 18. Nursing Home and rehabilitation institutions accommodation appropriate to apply sound insulation requirements laid down in the apartments. Minimum sound insulation requirements as appropriate this annex 10, 11, 12, 13, 14, 15, 16 and 17 (temporary accommodation) IV. Medical and health care institutions



Sound insulation the air index R ' w (dB) 19. Between the Chambers, as well as between the Chambers and similar spaces between the Chambers, 52 20. similar rooms and shared rooms (stairwells, hallways, lobby, day room, the dining room of the residence) 53 Chambers comparable spaces is an examination and procedure rooms, as well as physician offices 21. Between the operation rooms, between the operation rooms and other rooms (except the spaces in which the equipment what caused the noise) 55 22. Between the intensive care wards, between the ICU and Hall 37 if the walls have Windows 23. Between Chambers and similar rooms and kitchen, technical service and maintenance facilities 60 24. Between special premises (such as hearing tests Cabinet) and other facilities 62 25 25.1 25.2 25.3. the... Doors, Windows or their complexes: between Chambers and the passage between the intensive care room and the corridor between hearing examination room and other rooms. Triecientrokšņ level 32 27 36 reduced index L ' n, w (dB) 26. From Chambers and similar premises to other premises of this annex 57 26, 27 and 28 of the Court referred to and similar spaces are also operating room 27. From premises (stairwells, corridors, lobby, day room of the residence) and comparable to the court rooms of 57 28 rooms where the sound source (kitchen , technical service and maintenance facilities), the Chambers and similar premises if necessary, carry out additional measures for the reduction of struktūrtrokšņ v. Ministry of education and science of building sound insulation the air index R ' w (dB) 29 schools between classes and similar premises between those rooms and shared rooms (stairwells, corridors, halls, lobby) 54 29. of this annex, 30, 31, 32, 33, 34, 35, 36, 37 and 38. the requirements set out in paragraph 1 does not apply to training institutions for children with hearing impairments. Classes spaces are comparable training Office and similar classroom 30. Between large audiences (more than 100), between the large audience teaching rooms 57 31. Between large audiences and sharing premises (stairwells, corridors, halls, lobby) 55 32. Between classes, training Office, classrooms, and special classes 60 33. Between special classes and sharing premises (staircase, corridors, halls, lobby) special class 57 's music class , workshops and sports medicine 34. Between classes, training, audiences and the kitchen cabinet, dining hall 21.8.35.2.55 35. Doors, Windows or their complexes: between classes, similar spaces and hallways between classes and similar premises (except music) 30 32 36. Between preschool institutions group rooms and dormitories Between preschool institutions 50 37. Group spaces, dormitories and kitchen 52 38. Between preschool institutions group rooms dormitories and a music room, or the gym door from 55 39. pre-school institutions group rooms or dormitories on the Hall level Triecientrokšņ 30, reduced index L ' n, w (dB) 40. classes (teaching Office) to another class (teaching Office) 60 if necessary, carry out additional measures for reducing struktūrtrokšņ 41. From premises (stairwells, corridors, halls, lobby) to classes (teaching Office) 58 42. From the special class to class (teaching Office , the audience) or other special class of 50 43 large audiences to the classroom or other audience of pre-school institutions 48 44 group rooms, dormitory to another group rooms and dormitories of pre-school institutions 60 45 shared spaces (hallway, staircase, hall) to the Group rooms and dormitories, from the kitchen to the team rooms and dormitories of pre-school institutions 55 46 music rooms, gym on the premises of the Group and the dormitory administration building 53 VI. Sound insulation index of air R ' w (dB) between the 47. rooms, work rooms and staircases, corridors, halls, lobby for 50 48.29.9.30.0. Doors, Windows or their complexes: from work rooms to hallways, staircases, halls, lobby of Hall to the corridors, staircases, halls, lobby. 30.5 30.6 30.6 30 36 49.... "between the rooms and premises containing source with a maximum noise level: 80 DBA 81-90 91-100 dB dB. 52 62 72 kitchen, technical and staff rooms for cafes, bars, shops, restaurants, gym 50. Between the Court halls, Conference halls and corridors, staircases, hall, the lobby, the business and the technical rooms Triecientrokšņ level 55 reduced index L ' n, w (dB) 51. From the workspace to the workspace from the shared workspace to workspace 60 52. From premises where the noise source (kitchen, technical service and maintenance facilities) to medicinal products 50 VII. Cultural and entertainment institutions sound in insulated air index R ' w (dB) 53. Between the halls, library and reading room foyer, hall or corridors Between Medicine, 57 54. library reading room and unused attic, cellar and storage premises 52 55.   55.1 55.2 55.3. Between the grass.., library, reading room and premises containing noise sources with the maximum level: 80 DBA 81-90 91-100 dB dB. 60 70 80, take accompanying measures to reduce struktūrtrokšņ 56. Between halls, library and reading room work areas 55 57. Between audiences and Conference Centers 62 58. Between the theater and concert halls cinemas 75 69 59. Between the Triecientrokšņ reduced the level of the index L ' n, w (dB) 60. From premises where the noise source (technical spaces, machinery spaces), to the Hall of Foyer, hall 48 61 rooms, hallways and workrooms to medicinal products 53 62. From the Hall to the room of drugs to 50 63. working premises 63 VIII. 64. The sports buildings among the sports halls, swimming pools and the foyer, hall or corridors Between 45 65. gym, swimming pools and bars, cafes 48 66. Between gyms, swimming pools and work rooms 52 Triecientrokšņ level reduced index L ' n, w (dB) 67. Of gyms, swimming pools, bars and cafes to working premises 63 economic Minister j. lujans annex 4 to the Latvian et seq LBN 016-03 "Būvakustik" (approved by Cabinet of Ministers of 29 April 2004 the Regulation No 468) sound insulation index R ' w/L ' n , w (dB) check values building internal structures no boundaries p.k. acoustic mode in a room that contains the source of the sound Isolated room degree of protection low medium high 1. Quiet 42/47/52/55 60 65 2. Maztrokšņain 47/52/55/60 57 50 55 52/Noisy 3 57/62/45 50 4. Very noisy 57/62/67/45 50 45 economic Minister j. lujans annex 5 Latvian et seq of LBN 016-03 "Būvakustik" (approved by Cabinet of Ministers of 29 April 2004 the Regulation No 468) requirements for external delimiting structural sound insulation from the outside noise, no PO box room type minimum sound insulation index of R in the air ' tr, s, w (dB) if external noise levels Lp, eq, limit is (dB): up to 55 56-60 61-65 66-70 71-75 76-80 81-85 1. Dormitory hospital, operating room, the audience Hall 30 35 40 45 50 ** 2. Living space and higher category hotels , the dormitory in preschool and social care institutions 25 30 35 40 45 50 3 Office, temporary accommodation in hostels, classrooms, teaching in the Cabinet of 20 25 30 35 40 45 50 4. Working areas, waiting rooms, apartments, restaurant, cafeteria, room the halls – 20 25 30 35 40 45 note. The external noise level is too high in these spaces, to reduce the need to take specific measures.
Minister of Economic Affairs j. lujans annex 6 to the Latvian et seq LBN 016-03 "Būvakustik" (approved by Cabinet of Ministers of 29 April 2004 the Regulation No 468) coefficient R, s, w ' tr a correction factor that depends on the design of the containment area and floor area ratio of S/S/So So 2.5 2.0 1.6 1.3 1.0 0.8 0.6 0.5 0.4 correction factor + 5 + 4 + 3 + 2 + 1 0-1-2-3 notes. 1. external S-space delimited design area (m2). 2. So, the floor area (m2).
Minister of Economic Affairs j. lujans