1、 3746null2013 ISO 3746:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Survey methods using an enveloping measurement surface over a reflecting plane (IDT) 37462013II1 - ( ) , 4 2 358 3 - 5 2013 . 2175-4 3746:2010 . . (ISO 3746:2010 Ac
2、oustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Survey methods using an enveloping measure -ment surface over a reflecting plane). - - , 5 5140299 1.02012 ( 8). ( 1 ) , . () . , (gost.ru) , 2014 , - - 37462013III1 12 23 .24 55 56 , 67 .88 109
3、 .1410 1711 .18 A () 19 B () 20 C () 24 D () 28 A () ( ) .35 36 37462013IV (. 2 6, 3744), - , , . - ( ) . 1. 2 6, 3744 . . . 12001 . - . , - , , . - , , - , 3744, 5 14 16. 2 6 14 16 .1 20141201 1 1.1 ( ) , , - , ( ) , . , . -, , (. 12001).1.2 (, , -, .) 12001. (, , ), . - , , , . .1.3 , , - , . 1.4
4、( ). - 12001 . 37462013 Acoustics. Determination of sound power levels and sound energy levels of noise sources using sound pressure.Survey methods using an enveloping measurement surface over a reflecting plane 3746201322 : 3744 . . - (ISO 3744, Acoustics Determination of sound power levels and sou
5、nd energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane) 5725 ( ) ( ) - ISO 5725, Accuracy (trueness and precision) of measurement methods and results 12001:1996 . , . (ISO 12001:1996, Acoustics Noise emitted by machinery and e
6、quipment 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, Electroacous-tics Sound calibrators) 61672-1:2002 . . 1. (IE
7、C 61672-1:2002, Electroacoustics Sound level meters Part 1: Specifications)3 :3.1 (sound pressure) p: - . 1 8-9.2 23. 2 p ().3.2 (sound pressure level) Lp: p p0(p0= 20 ), () Lppp=10202lg. (1)22, 2.2 1 , , , LpA (. . ). 2 8-22 23.3.3 (time-averaged sound pressure level) Lp,T: - T ( t1 t2) p p0 (p0 =
8、20 ), () LpTptdtpTtt,=()101 21202lg. (2) 1 T , , Lp,T . 2 T - . LpA,T, , LpA. 374620133 3 2.3 22.3.4 (single event time-integrated sound pressure level) LE: T ( t1 t2) p - ( ) E0E0 = (20 )2 = 410102, () LEptdtEtt=()102120lg. (3) 1 - LLEpTTT=+,100lg , T0= 1 . 2 (. 22).3.5 (measurement time interval)
9、T: , , . T ().3.6 (reflecting plane): , .3.7 (frequency range of interest): , , () 125 8000 .3.8 (reference box): - , - ( ) , , (), . -, , , 18 21.3.9 () (characteristic source dimension) dO: . dO ().3.10 (measurement distance) d: - . d ().3.11 (measurement radius) r : , - , . r ().3.12 (measurement surface): , - , () ( ).3.13 (background noise): , .
