17.140.99 有关声学的其他标准 标准查询与下载

EN ISO 14163:1998 声学.消声器噪声控制指南.包含修改件第1号;Iso 14163-1998

Acoustics - Guidelines for Noise Control by Silencers

BS EN ISO 11821:1997 声学.可移动声屏障声衰减的现场测量

This International Standard specifies methods for evaluating the in situ sound attenuation performance of a removable screen, either indoors or outdoors. This engineering grade method is based on an insertion loss measurement that can be carried out either with shielding of the actual sound source(s) or using an artificial sound source. The sound attenuation performance achieved by such a screen, as evaluated by the present International Standard, depends on: — diffraction around the edges of the screen; — transmission through the components of the screen; — absorption of the panels of the screen, as well as in its surroundings; — the room in which the screen stands if indoors. When a specific work station is to be shielded, the in situ sound attenuation value describes the effect of the screen. However, when a complete area is to be shielded, the performance of the screen will vary depending on the positions used for measurement. Therefore, it is recommended that the maximum and minimum values of sound attenuation are given. The sound attenuation performance is determined in terms of insertion loss. When assessing the performance of a screen located indoors, the room geometry and reflections from walls, ceilings and room fittings will influence the performance. As a consequence, the comparison of screen performance can only be made if the test conditions are identical. This International Standard is applicable to screens with height and length greater than 1,5 m. However, it may also be used for smaller screens provided that the interested parties come to an agreement on this. As environmental conditions can affect the measurements outdoors, it is recommended that measurements should be restricted to within 25 m of the screen. However, measurements may also cover a greater distance provided that the interested parties come to an agreement on this. Differences can occur between in situ test results. Therefore, comparison of the performance of different screens can be made only on the basis of data based on the same measurement method performed at the same location. This International Standard applies to a complete screen only and not to individual components from which it is made. Sound insulation and sound absorption for screen components (such as panel elements, doors, windows) should be measured according to other relevant standards. This International Standard is not applicable to open plan offices screens nor to outdoor barriers dealing with community noise. It is also not intended for qualification purposes.

Acoustics - Measurement of the in situ sound attenuation of a removable screen

BS EN ISO 11820:1997 声学.声器的现场测量

1 This International Standard specifies measure-ments on silencers in situ. It is applicable to measure-ments on silencers in practical applications for acoustic analysis, acceptance tests and similar evaluations. Results obtained in accordance with this International Standard cannot be compared to per-formance data obtained from laboratory measure-ments on ducted silencers in accordance with ISO 7235, partly because of different test conditions (such as sound field distribution, flow, temperature and mounting conditions) and partly because of different definitions. Depending on the method used, the measurement is either of — insertion loss Dis, or — transmission loss Dts. The measurement method depends upon the type of silencer and the installation conditions (e.g. insertion loss measurements must be carried out for blowdown silencers). NOTE 1 The subscripts denote the practical application of the silencer and the particular installation and operating conditions: V stands for "in situ", "t" for transmission, and "i" for insertion. Additional characteristic quantities, which could in-clude measurements taken using artificial sound sources or measurements taken to determine the di-rectivity of sound propagation from the silencer, may be agreed upon in accordance with this International Standard. 2 This International Standard is applicable to a) silencers which are installed either as a whole or in the form of individual baffles in the propagation path of sound (e.g. openings of ducts) originating from a sound source (machine, building, plant such as a gas turbine generator, scrubbing plant, cooling tower, heating ventilation and air con-ditioning (HVAC) plant, exhaust stack, air intake duct, weapon, internal combustion engine, com-pressor, etc.); b) all types of passive silencers (absorptive, reac-tive, reflection and blowdown silencer); c) active silencers (involving amplifiers and loud-speakers) as far as the insertion loss of passive silencers is equivalent to the off/on conditions of active devices; and d) other measures or means of effecting acoustic attenuation in air or other gases (e.g. components installed in ducting, louvres, grilles and deflector hoods). Additionally, this International Standard is applicable to the determination of the effect of cleaning or refurbish-ing silencers. This International Standard is not applicable to closed high-pressure systems (e.g. silencers in closed pipes) since measurements of structure-borne sound are not anticipated. 3 Quantities to be measured include the following: a) sound pressure levels in octave bands with centre frequencies at least from 63 Hz to 4 kHz and, if possible and required, from 31,5 Hz to 8 kHz or in one-third-octave bands with centre frequencies from 50 Hz to 5 kHz and, if possible and required, from 25 Hz to 10 kHz — at a point or points on the source side of a silencer, — at a point or points on the receiver side of a silencer; b) static and dynamic pressures, flow velocities and temperatures at selected positions. Operating data to be determined include flow rate, pressure and speed, which define the operating con-ditions of the machine or plant to be silenced.

Acoustics - Measurements on silencers in situ

DIN EN ISO 11821:1997 声学.可移动声屏障声衰减现场测量

The document specifies methods for the measurement of the sound attenuation performance of removable screens in situ.

Acoustics - Measurement of the in situ sound attenuation of a removable screen (ISO 11821:1997); German version EN ISO 11821:1997

EN ISO 11821:1997 声学.可移遮板就地声音降低的测量 ISO 11821-1997

Acoustics - Measurement of the In Situ Sound Attenuation of a Removable Screen ISO 11821: 1997

ISO 11821:1997 声学 可移动声屏障声衰减的现场测量

This International Standard specifies methods for evaluating the in situ sound attenuation performance of a removable screen, either indoors or outdoors. This engineering grade method is based on an insertion toss measurement that can be carried out either with shielding of the actual sound source(s) or using an artificial sound source. The sound attenuation performance achieved by such a screen, as evaluated by the present International Standard, depends on: — diffraction around the edges of the screen; — transmission through the components of the screen; — absorption of the panels of the screen, as well as in its surroundings; — the room in which the screen stands if indoors. When a specific work station is to be shielded, the in situ sound attenuation value describes the effect of the screen. However, when a complete area is to be shielded, the performance of the screen will vary depending on the positions used for measurement. Therefore, it is recommended that the maximum and minimum values of sound attenuation are given. The sound attenuation performance is determined in terms of insertion loss. When assessing the performance of a screen located indoors, the room geometry and reflections from walls, ceilings and room fittings will influence the performance. As a consequence, the comparison of screen performance can only be made if the test conditions are identical. This International Standard is applicable to screens with height and length greater than 1,5 m. However, it may also be used for smaller screens provided that the interested parties come to an agreement on this. As environmental conditions can affect the measurements outdoors, it is recommended that measurements should be restricted to within 25 m of the screen. However, measurements may also cover a greater distance provided that the interested parties come to an agreement on this. Differences can occur between in situ test results. Therefore, comparison of the performance of different screens can be made only on the basis of data based on the same measurement method performed at the same location. This International Standard applies to a complete screen only and not to individual components from which it is made. Sound insulation and sound absorption for screen components (such as panel elements, doors, windows) should be measured according to other relevant standards. This International Standard is not applicable to open plan offices screens nor to outdoor barriers dealing with community noise. It is also not intended for qualification purposes.

Acoustics - Measurement of the in situ sound attenuation of a removable screen

DIN EN ISO 11820:1997 声学.现场消声器测量

Acoustics - Measurements on silencers in situ (ISO 11820:1996); German version EN ISO 11820:1996

NF S31-630:1997 声学.客舱隔音性能测定.实验室和施工现场噪音测量

Acoustics. Determination of sound insulation performance of cabins. Laboratory and in situ measurements.

NF S31-024-2:1996 声学.使用声压法对噪声源声强级的测定.混响声场中小声源和移动声源的工程测量方法.第2部分:特殊混响试验间用方法

Acoustics. Determination of sound power levels of noise sources using sound pressure. Engineering methods for small, mowable sources in reverberant fields. Part 2 : methods for special reverberation test rooms.

EN ISO 3743-2:1996 声学.声压法测定噪声源的声功率级.在混响场中对小声源,可移动声源的工程测量方法.第2部分:用专用混响试验室的测量方法 ISO 3743-2-1994

Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure - Engineering Methods for Small, Movable Sources in Reverberant Fields - Part 2: Methods for Special Reverberation Test Rooms ISO 3743-2 : 1994

NF S31-610:1996 声学.无流量导管消音器插入损耗率的测量.试验室调研法

Acoustics. Measurement of insertion loss of ducted silencers without flow. Laboratory survey method.

EN ISO 11820:1996 声学.现场消声器的测量 ISO 11820-1996

Acoustics - Measurements on Silencers in Situ ISO 11820: 1996

EN ISO 11957:1996 声学.客舱隔声性能的测定.实验室测量和现场测量 ISO 11957-1996

Acoustics - Determination of Sound Insulation Performance of Cabins - Laboratory and In Situ Measurements ISO 11957: 1996

CNS 13583-1995 积分均值声度表

本标准适用于 0 ~ 3 型之积分均值声度表（以下简称积分声度表）。备考：积分声度表与传统声度表在时间平均特性有一些重要的差异，详见附录 1。

Intergrating-Averaging Sound Level Meters

EN ISO 11691:1995 声学.无气流管道消声器插入损失的测量.实验室测量 ISO 11691-1995

Acoustics - Measurement of Insertion Loss of Ducted Silencers without Flow - Laboratory Survey Method ISO 11691:1995

ISO 11691:1995 声学 无气流管道消声器插入损失的测量 实验室测量法

Specifies a laboratory substitution method to determine the insertion loss of ducted circular and rectangular silencers without flow, as well as other duct elements for use in ventilating and air-conditioning systems.

Acoustics - Measurement of insertion loss of ducted silencers without flow - Laboratory survey method

NF S31-127:1995 声学.管道消声器的测量程序.插入损耗、流动噪声和总压力损失

Acoustics. Measurement procedures for ducted silencers. Insertion loss, flow noise and total pressure loss.

ISO 7235:1991 声学 管道消音器的测量步骤 插入损失、流动噪声和总压损失

Acoustics; measurement procedures for ducted silencers; insertion loss, flow noise and total pressure loss