GB/T 19512-2004声学　消声器现场测量.pdf

ICS 91.120.20Z 32 荡黯中 华 人 民 共 和 国 国 家 标 准 GB/T 19512-2004/ISO 11820:1996 声学 消声器现场测量 Acoustics-Measurements on silencers in situ (ISO 11820:1996,IDT) 2004-05-13发布 2004-12-01实施 中华人民共和国国家质量监督检验检疫总局中 国 国 家 标 准 化 管 理 委 员 会 发 布 GB/T 19512-2004/LSO 11820:1996 目 次 前言 ···········································································?? 工引言 ·····················，···············‘···································?? 81 范围 ·....................······，·，，·甲，··············‘· ··················一 11. 1 概 述 ，···········，·················，···········，··，························?? I1.2 本标准的应用范围 ··············································..·······..?? 11.3 被测量 ·································································?? 12 规范性引用文件 ··································， ············.·······?? 13 术语和定义 ·..............·······，，······‘···········‘··········，·········?? 24 背景噪声的修正 ·············‘·········，···········，·················，··....??，二54.1 传递声压级差 ·······，·····································..·......··......·?? 54.2 插人声压级差 ··························································.·.?? 55 安装条件 ·······················································，········? ? 56 仪器 ·· ············，···························，，·，·····················?? 76.1 声学仪器 ········，，，，··】】】···甲，·，，，·· ··········‘········，，，，·，- 。 ···一 76.2流速、静压和温度的测量设备 ······，，·········??。··。·.·...·... ....??77 测量对象和测量条件 ·····。·············，，···································.·..?? 78 测量程序 ·········............................................................ 78.1 概 述 ·············· ‘············...............····················?? 78 2 声 学测量 ···············1···甲，·，··· ··。·，······甲甲，······· ...........·，甲，79.3 气流、压力和a度的测量·············································??卜....??99 计算···，··························································，······?? 109. 1 声压级测量计算·············································.·.......?? 109.2 气流测量计算·········· ··············‘···········，················，········?? 1210 记录内容 · ·