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IISO（国际标准化组织）和thC（国际电子学委员会）最近批准公布的新标准和原标准的修订版。1．11Stl：（1）ISO4869－2：1994，护耳器——第fu部分：戴着护耳器时，有效A计权声压级的估计．（2）ISOlo844：1994，声学——对道路车辆辐射噪声的测量路径的规定。（3）ISO3743－1
IISO (International Organization for Standardization) and thC (International Electrotechnical Commission) recently approved the release of the new standard and the original standard revision. 1.11Stl: (1) ISO 4869-2: 1994, Ear protectors - Part fu: Estimation of the effective A-weighted sound pressure level when wearing the ear protector. (2) ISOlo844: 1994, Acoustics - Provisions for measuring paths for radiated noise of road vehicles. (3) ISO3743-1