GB/T 21231-2007

GB/Z 27764-2011 Acoustics - Determination of sound transmission loss in impedance tubes - Transfer matrix method GB/Z 38251-2019 Acoustics—Calculation of sound attenuation during propagation for electrical converter station—Engineering method GB/Z 40842-2021 General technical requirenments for electrolarynx GB/Z 3222.3-2026 Acoustics—Description, measurement and assessment of environmental noise—Part 3: Objective method for the measurement of prominence of impulsive sounds and for adjustment of LAeq GB/Z 41283.2-2026 Acoustics—Soundscape—Part 2: Data collection and reporting requirements GB/Z 7584.5-2026 Acoustics—Hearing protectors—Part 5: Method for estimation of noise reduction using fitting by inexperienced test subjects GB/Z 41283.3-2026 Acoustics—Soundscape—Part 3: Data analysis GB/T 3770-1983 Determination of sound power level for noise emitted by woodworking machinery