GB/T 19512-2004声学　消声器现场测量.pdf

ICS91.120.20 Z 32 荡黯 中 华 人 民 共 和 国 国 家 标 准 GB/T 19512-2004/ISO11820:1996 声学 消声器现场测量 Acoustics-M easurementsonsilencersinsitu (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 发 布 中 国 国家 标 准 化 管 理 委 员 会 GB/T19512-2004/LSO 11820:1996 目 次 前言 ·················································································································…… 工 引言 ·······························，······················‘···················································…… 8 1 范围 ··········，·，，·甲，·······················‘·· ····························一 1 1.1 概述 ，·················，，···························，·················，····，···································…… I 1.2 本标准的应用范围 ········································································...··········...…… 1 1.3 被测量 ·······································································································…… 1 2 规范性引用文件 ·······················································，， ··················.·.···········…… 1 3 术语和定义 .·············，，··········‘·················‘················，，··············…… 2 4 背景噪声的修正 ····················‘·············，，················，，···························，，··.·……，二5 4.1 传递声压级差 ···········，························································.·..···.··…… 5 4.2 插人声压级差 ···························································································..·…… 5 5 安装条件 ······················································································，············… … 5 6 仪器 ·······················，···········································，，，·，································…… 7 6.1 声学仪器 ·············，，，，，···】】】】】·····甲，·，，，，···