음향 — 청각 보호구 — 제2부: 청각 보호구 착용 시 유효 A-가중 음압레벨 감쇠효과 추정
声学 - 听力保护器 - 第2部分:听力保护器磨损时有效A加权声压级的估计

2020-12-30

Acoustics -- Hearing protectors -- Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
声学听力保护器第2部分:佩戴听力保护器时有效A计权声压级的估算

2020-01-01

Acoustics — Hearing protectors — Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
声学听力保护器第2部分:戴听力保护器时有效A计权声压级的估计

2018-10-04

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--Hearing protectors--Part 2:Estimation of effective A-weighted sound pressure levels when hearing protectors are worn

1999-08-24

ACOUSTICS. HEARING PROTECTORS. PART 4: MEASUREMENT OF EFFECTIVE SOUND PRESSURE LEVELS FOR LEVEL-DEPENDENT SOUND-RESTORATION EAR-MUFFS. (ISO/TR 4869-4:1998)
声学听力保护器 第4部分:声级相关的声音恢复耳罩的有效声压级测量 （ISO/TR 4869-4-1998）

2000-11-21

ACOUSTICS. HEARING PROTECTORS. PART 2: ESTIMATION OF EFFECTIVE A-WEIGHted sound pressure levels when hearing protectors are worn. (ISO 4869-2:1994).
声学听力保护器 第2部分:佩戴听力保护器时有效A计权声压级的估计 （ISO 4869-2:1994）

1996-05-23