声学和声学测量标准-分析测试百科网

ASA S12.53/1-1999 用声压测量混响室小的可移动噪声源声音功率水平声学因素机械方法,第1部分硬墙壁测试房间ANSI S12.53/1-1999.ISO 3743-1: 1994

American national standards on acounstics。

Acoustics - Determination of Sound Power Levels of Noise Sources - Engineering Methods for Small, Movable Sources in Reverberant Fields - Part 1: Comparison Method for Hard-Walled Test Rooms ANSI S12.53/1-1999; ISO 3743-1: 1994

ICS: 17.140
CCS: A59
发布: 1999-01-01
实施

ASA S12.53/2-1999 用声压测量混响室小的可移动噪声源声音功率水平声学因素机械方法,第2部分特殊混响测试房间ANSI S12.53/2-1999.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 ANSI S12.53/2-1999; 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

ICS: 17.140
CCS: A59
发布: 1999-01-01
实施

ASA S12.56-1999 用声压测量有反射面的包围面声源声音功率水平声学因素测量方法ANSI S12.56-1999.ISO 3746: 1995

This international standard is one of the ISO 3740 series.

Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure - Survey Method Using an Enveloping Measurement Surface over a Reflecting Plane ANSI S12.56-1999; ISO 3746: 1995 [Replaced: ASA S12.36]

ICS: 17.140
CCS: A59
发布: 1999-01-01
实施

ASA S12.54-1999 用声压测量有反射面的空场地声源声音功率水平声学因素机械方法ANSI S12.54-1999.ISO 3744: 1994

This international standard specifies method for measuring the sound pressure levels on a measurement surface enveloping a noise source.

Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure - Engineering Method in an Essentially Free Field over a Reflecting Plane Erratum; ANSI S12.54-1999; ISO 3744: 1994 [Replaced: ASA S12.34]

ICS: 17.140
CCS: A59
发布: 1999-01-01
实施

ASA S3.46-1998 助听器真实耳朵动作特征测量方法

Methods of Measurement of Real-Ear Performance Characteristics of Hearing Aids

ICS: 17.140
CCS: L31
发布: 1998-01-01
实施

ASA S12.8-1998 测定户外噪声障插入损失方法

1.1 This Standard adopts insertion loss—the difference between acoustical levels before and after a noise-barrier installation—as the basis for evaluating the acoustical effectiveness of an outdoor noise barrier. Methods are provided to determine the insertion loss of outdoor noise barriers at selected receiver locations and under conditions of interest. 1.2 This Standard covers insertion loss determination, by measurement or by the combination of measurement and prediction, for outdoor noise barriers of all types. Sound sources at a site may be those that are naturally present, controlled natural sound sources, or controlled artificial sound sources. Preferred acoustical descriptors are time-average, A-weighted sound level, Aweighted sound exposure level, or octave-band sound pressure level. Other acoustical descriptors of the BEFORE and AFTER sound are not precluded. 1.3 Standardized receiver locations or measurement conditions are not prescribed. Measured insertion losses apply only for the stated conditions and are not to be generalized to represent other conditions, sites, receiver locations, or sound sources. 1.4 This Standard may be used for routine checking of the insertion loss of an outdoor noise barrier, or for engineering or diagnostic evaluations. The methods of the Standard may be used in situations where a barrier is to be installed, or has already been installed. 1.5 This Standard does not present methods for comparing the insertion loss of outdoor noise barriers at different sites, nor does it specifically address sound transmission loss through a barrier. While comparisons of the insertion loss of outdoor noise barriers at different sites or extrapolations to other conditions may be possible, such comparisons or extrapolations are not within the scope of this Standard. 1.6 Reliable and repeatable results may be expected when the distances between all receivers and their closest and strongest sound sources (or closest point of approach for mobile sound sources) are within 70 m. The methods of the Standard may be applied for other conditions, but the experimental uncertainties likely will increase, perhaps substantially. 1.7 This Standard presents two methods for indirectly determining the level of the BEFORE sound. The two methods are (1) by measurement at a second site that is equivalent to the desired site prior to installation of the barrier, or (2) by prediction of the BEFORE sound levels. Equivalence here is in terms of sound-source characteristics, receiver locations, and terrain, atmospheric, and ground conditions. The Standard presents principles, not procedures, for assessing soundsource, atmospheric and terrain equivalence, as well as for choosing a model to predict the level of BEFORE sound. 1.8 This Standard presents a method to determine a lower bound to the insertion loss when background noise prevents clear measurement of the source sound level at a receiver location. In many applications, reporting a barrier insertion loss for a given receiver location as ‘‘equal to or greater than X dB’’ is sufficient. This Standard also presents a method to determine the total experimental uncertainty associated with the barrier insertion loss. 1.9 Because of many factors affecting the sound levels at receiver locations, it may not be possible to determine the insertion loss of an outdoor noise barrier for conditions of interest.

METHODS FOR DETERMINING THE INSERTION LOSS OF OUTDOOR NOISE BARRIERS

ICS: 17.140
CCS: Z32
发布: 1998-01-01
实施

ASA S12.9 PART 5-1998 描述和测量环境声音数量和程序,第5部分协调土地用途声音描述符

Quantities and Procedures for Description and Measurement of Environmental Sound - Part 5: Sound Level Descriptors for Determination of Compatible Land Use

ICS: 17.140
CCS: A59
发布: 1998
实施

ASA S12.6-1997 听力保护器测量人耳衰减方法

This standard specifies laboratory-based procedures for measuring, analyzing, and reporting the noise-reducing capabilities of hearing protection devices. The methods consist of psychophysical tests conducted on human subjects to determine real-ear attenuation at threshold. Two methods are provided, differing in their subject selection, training, hearing protector fitting procedures, and experimenter involvement, but corresponding in all electroacoustic and psychophysical aspects. One method, designated experimentersupervised fit is intended to describe the upper limits of hearing protector performance. The second method, designated subject fit, is conducted with persons naive with respect to the use of hearing protection. It approximates the attenuation that has been achieved by groups of users as reported in real-world occupational studies (Berger and Franks,1996).

Methods for Measuring the Real-Ear Attenuation of Hearing Protectors