GOST R ISO 3744-2013 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field o.pdf

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1、 3744null2013 ISO 3744:2010 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(IDT) 37442013II 1 - ( ) , 4 2 358 3 - 5 2013 . 2177-4 3744:2010 . - . (ISO 3744:2010, Acou

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5、1 .2 : 3382-2 . . 2. - (ISO 3382-2, Acoustics Measurement of room acoustic parameters Part 2: Reverberation time in ordinary rooms) 3745 . . (ISO 3745, Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for anechoic test room

6、s and hemi- anechoic test rooms) 5725 ( ) ( ) - ISO 5725, Accuracy (trueness and precision) of measurement methods and results 6926 . , (ISO 6926, Acoustics Requirements for the performance and calibration of reference sound sources for the determination of sound power levels) 12001:1996 . , . (ISO

7、12001:1996, Acoustics Noise emitted by machinery and equipment Rules for the drafting and presentation of a noise test code) / 98-3 . 3. (GUM) ISO/IEC Guide 98-3, Uncertainty in measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 60942:2003 . (IEC 60942: 2003, Electr

8、oacoustics Sound calibrators) 61260:1995 . (IEC 61260:1995, Electroacoustics Octave-band and fractional-octave-band filters) 61672-1:2002 , . 1. (IEC 61672-1:2002, Electroacoustics Sound level meters Part 1: Specifications)3 .3.1 (sound pressure) p: - . 1 8-9.2 21. 2 ().3.2 (sound pressure level) Lp

9、: p p0(p0 = 20 ), () LpppuniF03DuniF0E9uniF0EBuniF0EAuniF0EAuniF0EAuniF0F9uniF0FBuniF0FAuniF0FAuniF0FA10202lg. (1)20, 2.2 1 , , , LpA (. . ). 2 8-22 21.3.3 (time-averaged sound pressure level) Lp,T: T 374420133( t1 t2) p p0(p0= 20 ), () LTptdtppTtt,lg()uniF03DuniF0E9uniF0EBuniF0EAuniF0EAuniF0EAuniF0

10、EAuniF0EAuniF0EAuniF0EAuniF0F9uniF0FBuniF0FAuniF0FAuniF0FAuniF0FAuniF0FAuniF0FAuniF0FAuniF0F210120212. (2) 1 T , , Lp,T . 2 T - . LpA,T, , LpA. 3 2.3 20.3.4 (single event time-integrated sound pressure level) LE: T ( t1 t2) p ( ) E0E0 = (20 )2 = 4 10102, () LptdtEEttuniF03DuniF0E9uniF0EBuniF0EAuniF0EAuniF0EAuniF0EAuniF0EAuniF0EAuniF0EAuniF0F9uniF0FBuniF0FAuniF0FAuniF0FAuniF0FAuniF0FAuniF0FAuniF0FAuniF0F2102012lg(). (3) 1 - LLTTEpT=+,lg100, T0= 1 . 2 (. 20).3.5 (measurement time interval) T: , , .