美利体育登录入口官网

给水用1/2 In.(12 mm)到2 In.(50 mm)聚乙烯-铝-聚乙烯和交联聚乙烯-铝-交联聚乙烯复合压力管

Acoustics - Reference zero for the calibration of audiometric equipment - Reference threshold of hearing under free-field and diffuse-field listening conditions

声学 听力保护器

Acoustics - Hearing protectors

电声学 — 声级计的随机入射场和扩散场校准

Electroacoustics — Random - incidence and diffuse - field calibration of sound level meters

道路交通减噪美利体育官网首页网址 测定声学性能的试验方法 第2部分：扩散声场条件下气载声音隔音的本质特征（草案）

Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions

声学.低噪音(含机械噪音)工作场所的设计推荐实用规程.第3部分:工作间里噪音传播和声音预测

Acoustics - Recommended practice for the design of low-noise workplaces containing machinery - Part 3: Sound propagation and noise prediction in workrooms (ISO/TR 11690-3:1997); German version EN ISO 11690-3:1998

建筑物和构件的隔音测量 第4部分：建筑物房间之间空气传播隔音的测量

Measurement of sound insulation in buildings and components Part 4: Measurement of airborne sound insulation between rooms in buildings

精度等级 1 的声压测量 混响室方法的噪声源的最佳设置

Acoustics Determination of the sound power levels of noise sources from sound pressure measurements using reverberation chamber methods of accuracy class 1

声学 听力测试方法 第2部分：纯音和窄带测试信号的声场测听

Acoustics - Audiometric test methods - Part 2: Sound field audiometry with pure-tone and narrow-band test signals (ISO 8253-2:2009); German version EN ISO 8253-2:2009

确保测量一致性的国家体制.听力测定美利体育官网首页网址的校准用参考零点.自由场与扩散场测听的基准听阈

State system for ensuring the uniformity of measurements. Acoustics. Reference zero for the calibration of audiometric equipment. Part 7. Reference threshold of hearing under free-field and diffuse-field listening conditions

声学 校准测听美利体育官网首页网址的基准零级 第7部分:自由场和扩散场测听的基准听阈

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions

声学 校准听力美利体育官网首页网址的参考零点 第7部分：自由场和扩散场听音条件下的听力参考阈值

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:2005)