A59 声学计量 标准查询与下载

NAVY MIL-A-60681 NOTICE 2-1999 1000-37 旋转致动装置

MIL-A-60681, dated 23 June 1986, is inactive for new design and is no longer used, except for replacement purposes.

ACTUATOR, ROTARY 1000-37 ASSEMBLY

NAVY MIL-A-14897 NOTICE 2-1999 1000-34 旋转致动装置

MIL-A-14897, dated 29 August 1988, is inactive for new design and is no longer used, except for replacement purposes.

ACTUATOR, ROTARY 1000-34 ASSEMBLY

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

ASA S1.18-1999 地面阻抗模版方法ANSI S1.18-1999

Template Method for Ground Impedance ANSI S1.18-1999

Template Method for Ground Impedance ANSI S1.18-1999

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

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]

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]

ASA S3.1-1999 测听室最大可允许环境噪声水平

Hearing measurements in an audiometric test room may be conducted for different audiometric purposes over different test frequency ranges. However, if the ambient noise level is excessively high, some hearing threshold levels measured in that environment will be inaccurate. This occurs because excessively high ambient noise will create an elevation of hearing threshold levels. This is a psychoacoustic phenomenon called masking. Exclusion of all ambient noise from an audiometric test room is not feasible nor practical from structural and cost considerations. However, to ensure that hearing tests are not influenced by excessive ambient noise masking, there is a need to specify maximum permissible ambient noise levels (MPANLs) that can be allowed in an audiometric test room. This is true particularly when testing is done at sound pressure levels for pure tones corresponding to 0 dB hearing level. Further, there is a need to specify MPANLs for different audiometric conditions, test frequency ranges, and earphone types that will permit testing at reference equivalent threshold levels specified in ANSI S3.6- 1996 American National Standard Specification for Audiometers. This Standard includes the specification and measurement of MPANLs in an audiometric test room. Within this Standard, MPANLs are specified for octave and one-third octave band intervals from 125 to 8000 Hz for the audiometric conditions of testing with ears covered using a supra-aural and insert earphone and ears not covered for the test frequency ranges 125 to 8000 Hz, 250 to 8000 Hz, and 500 to 8000 Hz.

Maximum Permissible Ambient Noise Levels for Audiometric Test Rooms

ASTM E1001-99a 运用纵波的浸入式脉冲回波超声法探测与评价不连续性

1.1 This practice describes procedures for the ultrasonic examination of bulk materials or parts by transmitting pulsed, longitudinal waves through a liquid couplant into the material and observing the indications of reflected waves (Fig. 1). It covers only examinations in which one search unit is used as both transmitter and receiver (pulse-echo) and in which the part or material being examined is totally submerged in the couplant (immersion testing). This practice includes general requirements and procedures which may be used for detecting discontinuities and for making a relative or approximate evaluation of the size of discontinuities. 1.2 This practice complements Practice E214 by providing more detailed procedures for the selection and calibration of the inspection system and for evaluation of the indications obtained. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Practice for Detection and Evaluation of Discontinuities by the Immersed Pulse-Echo Ultrasonic Method Using Longitudinal Waves

JJG 340-1999 1Hz～1000Hz测量水听器检定规程

Verification Regulation of Measuring Hydrophone in the Frequency Range 1Hz to 1000Hz

NF S31-510-1:1998 声学.低噪音机器设备设计推荐标准.第1部分:设计

Acoustics. Recommended practice for the design of low-noise machinery and equipment. Part 1 : planning.

EN ISO 5135:1998 声学.在混响室中测定空调终端设备,空调终端单元,阻尼器和调节阀门的噪声功率级别(ISO 5135:1997)

Acoustics - Determination of sound power levels of noise fromair-terminal devices, air-terminal units, dampers and valves by measurement in a reverberation room

NF S31-083-3:1998 声学.听力测试方法.第3部分:语言听力测定

Acoustics - Audiometric test methods - Part 3 : speech audiometry.

SANS 10843:1997 声学．单脉冲或系列脉冲的描述和物理测量的方法

Describes preferred methods for the description and the physical measurement of single impulsive sounds or short series of impulsive sounds and for the presentation of the data. It applies to single impulsive sounds or short series of impulsive sounds su

Acoustics - Methods for the description and physical measurement of single impulses or series of impulses

ISO/TR 389-5:1998 声学 听力测量设备校准的参考零 第5部分：频率范围 8 kHz 至 16 kHz 纯音的参考等效阈值声压级

Acoustics - Reference zero for the calibration of audiometric equipment - Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz

NAVY MIL-A-81327 A NOTICE 1-1998 (MK 46 MOD 0鱼雷用)声音定位装置

MIL-A-81327A, dated 13 March 1985, is inactive for new design and is no longer used, except for replacement purposes.

ACOUSTIC LOCATING DEVICE (FOR TORPEDO MK 46 MOD 0)

ASA S1.14-1998 辐射无线电频率电磁场25MHz～1GHz声学仪器磁化系数确定和测试用推荐规程

1.1 This Standard provides recommendations for specifying and testing the susceptibility of acoustical instruments to radiated electromagnetic fields. The instruments may be powered by batteries or from a public supply of electric power. Recommendations related to testing an instrument’s susceptibility to electromagnetic radiation are given in annex A. Annex B contains a bibliography of background information. 1.2 The Standard does not contain recommendations for specifying and testing the susceptibility of an acoustical instrument to conducted electromagnetic fields. The Standard does not contain recommendations to limit the radio-frequency electromagnetic fields that may be radiated by an acoustical instrument. It does not provide recommendations for the influence of radio-frequency fields on optional external cabling or ancillary devices. The Standard is not applicable to audiometers or hearing aids. 1.3 This Standard provides recommendations for electric and magnetic field strengths and for radiofrequency and acoustical test signals. 1.4 The Standard covers the range of radio frequencies from 25 MHz to 500 MHz, and an extended range from 25 MHz to 1 GHz (corresponding to wavelengths from 12 m to 0.333 m). 1.5 The recommendations of this Standard may be used to develop radio-frequency electromagnetic susceptibility requirements for specific acoustical instruments. For individual instrument standards, the recommended specifications for electromagnetic test-signal frequencies, and maximum field strengths, or any other recommendation of this Standard, may be modified as appropriate.

RECOMMENDATIONS FOR SPECIFYING AND TESTING THE SUSCEPTIBILITY OF ACOUSTICAL INSTRUMENTS TO RADIATED RADIOFREQUENCY ELECTROMAGNETIC FIELDS, 25 MHZ TO 1 GHZ

ARI 885-1998 在使用航空集散站和通风出口时估量占有空间声音水平程序

This standard includes sound levels from most but not ali components in the air distribution system. Air terminals, air outlets and the low pressure ductwork which connects them are considered as sound sources and are the subject of this Standard.

Procedure for Estimating Occupied Space Sound Levels in the Application of Air Terminals and Air Outlets Addendum 2002

JJG(船舶) 17-1998 声强仪性能校验规程

Sound Intensity Meter Performance Calibration Regulations

JJG 175-1998 测试电容传声器检定规程

Verification Regulation of Measuring Condenser Microphones