GB/T 7584.2-1999声学　护听器　第2部分：戴护听器时有效的A计权声压级估算.pdf

ICS13.340.20 C 71 中 华 人 民 共 和 国 国 家 标 准 Gs/T 7584.2一1999 idtISO 4869-2:1994 声 学 护 听 器 第2部分:戴护听器时有效的 A计权声压级估算 Acoustics-Hearingprotectors- Part2:EstimationofeffectiveA-weightedsoundpressurelevels whenhearingprotectorsareworn 1999一08一24发布 2000一05一01实施 国家 质 董 技 术 监 督 局 发布 cu/r7584.2-1999 目 次 前言 ·································································，········。··。····································…… 工 ISO前 言 ···············································。··············，·······，····························。·····。··…… II 弓1言 ·········································································，·······································…… 班 1 范围 .·I 2 引用标准 ····························。··。·································，······································…… 1 3 定义 ···································································，······················，······················。… 1 4护听器声衰减的测量 2 5 选定保护率护听器的假设保护值APV。的计算 ·········，·············································…… 2 6 倍频带法 ···········‘·····························································································…… 2 7高中低频衰减法(简称HMI,方法)·························，···········，························。..·..·...……3 8单值评定法(简称SNR方法) ····················································。···············一 ，...……4 附录A(提示的附录) 假设保护值APV、的算例 ················，，·······································…… 5 附录B(提示的附录)倍频带法计算I,，二举例 ··········“··················，··.·..·..·..·..·..·..·.……。…5 附录C(提示的附录) H值、M值和 I.值计算及使用举例 ················································…… 6 附录n(提示的附录) SNR值的计算和使用举例 ，···························，···············