A59 声学计量 标准查询与下载

ASA S12.12-1992 用声音强度测量噪声源声音能量水平机械方法ASA 104

Procedures for testing basic vastibular function.

Engineering Method for the Determination of Sound Power Levels of Noise Sources Using Sound Intensity

JJG 778-1992 噪声统计分析仪检定规程

Verification Regulation of Noise Level Statistical Analyzers

JJG 790-1992 标准电容传声器检定规程

Verification Regulation of Standard Condenser Microphones

EN 28798:1991 声学.窄频带屏蔽噪音参考等级(与ISO 8798-87一致)

Acoustics; reference levels for narrow-band masking noise (identical with ISO 8798:1987)

EN 27566:1991 声学.校准纯音响骨质传导听力计用标准参考零点(与ISO 7566-87一致)

Acoustics; standard reference zero for the calibration of pure-tone bone conduction audiometers (identical with ISO 7566:1987)

EN 27029:1991 声学.作为年龄和性别函数的耳科学上正常人空气传导听力阈值(与ISO 7029-84一致)

Acoustics; threshold of hearing by air conduction as a function of age and sex otologically normal persons (identical with ISO 7029:1984)

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

ISO 389:1991 声学.正弦波空气传导听力计校正标准参考零点

Acoustics; standard reference zero for the calibration of pure-tone air conduction audiometers

DIN 45631:1991 响度级和响度的计算程序

Procedure for calculating loudness level and loudness

BS 4196-8:1991 噪声源的声动率级.第8部分:基准声源的性能和校准规范

Sound power levels of noise sources. Specification for the performance and calibration of reference sound sources

ARMY MIL-H-49198 A NOTICE 1-1991 MK-1564()/AIC耳机麦克风套件[被代替:国防后勤局军用标准-H-55351 CANC 通知 3.国防后勤局军用标准-H-55351 通知 2.国防后勤局军用标准-H-55351 有效通知 1.国防后勤局军用标准-H-55351]

This commercial item description covers brown kraft paper used for general wrapping applications.

HEADSET-MICROPHONE KIT MK-1564( )/AIC [Superseded: DLA MIL-H-55351 CANC NOTICE 3, DLA MIL-H-55351 NOTICE 2, DLA MIL-H-55351 VALID NOTICE 1, DLA MIL-H-55351]

JJG(船舶) 5-1991 标准水听器球面波自由场互易法检定方法

Verification method of standard hydrophone spherical wave free field reciprocity method

JJG(船舶) 6-1991 标准水听器耦合腔互易法检定方法

Standard Hydrophone Coupling Cavity Reciprocity Method Verification Method

JJG(船舶) 7-1991 标准水听器振动液柱法检定方法

Verification method of standard hydrophone vibrating liquid column method

JJG 746-1991 超声探伤仪检定规程

Verification Regulation for Ultrasonic Inspection Instruments

JJG(电子) 12037-1991 DF5990A型扬声器谐振频率测量仪检定规程

Verification regulations for DF5990A loudspeaker resonant frequency measuring instrument

JJG(电子) 12036-1991 HY6060型驻极体传声器测试仪检定规程

HY6060 Electret Microphone Tester Verification Regulations

EN 26189:1991 声学.用于保护听觉的纯音响.空气传导阈值的听力测定(与ISO 6189-83一致)

Acoustics - Pure Tone Air Conduction Threshold Audiometry for Hearing Conservation Purposes

JJG(船舶) 8-1991 水声脉冲管测量装置检定规程

Verification rules for underwater acoustic pulse tube measuring device

ANSI/AMCA 301-1990 实验室试验数据中电扇声音等级的计算方法

This document establishes standard methods for calculating consistent fan sound ratings from laboratory test data. It applies to fans, blowers, exhausters or other air moving devices.

Methods for Calculating Fan Sound Ratings from Laboratory Test Data