GB/T 3768-2017 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane

Scope: 1.1 Overview This standard specifies the method for determining the sound power level or sound energy level of a noise source based on the sound pressure level measured on the surface surrounding the noise source (machinery or equipment) in a test environment that meets the given conditions. From these measurements, the A-weighted sound power level (or A-weighted sound energy level for bursts and transients) produced by the noise source can be calculated. Note: Different shapes of measurement surfaces will give different sound power level estimates for the same noise source. The corresponding test procedures in GB/T19052-2003 give detailed information on the selection of the measurement surface. 1.2 Noise and types of noise sources

GB/T 15173-2010 Electroacoustics.Sound calibrators
GB/T 19052-2003 Acoustics--Noise emitted by machinery and equipment--Rules for the drafting and presentation of a noise test code
GB/T 3785.1-2010 Electroacoustics-Sound level meters- Part 1:Specifications
ISO 3744 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for an essentially free field over a reflecting plane

2017 GB/T 3768-2017 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane
1996 GB/T 3768-1996 Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane
0000年 GB 3768-1983

GB/T 3768-2017Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane