1、 61094-22011 2 IEC 61094-2:2009Electroacoustics Measurement microphones Part 2: Primary method for pressure calibration of laboratory standardmicrophones by the reciprocity technique(IDT) 27 2002 . 184- , 1.02004 . 1 - - () ,42 3 - 13 2011 . 1080-4 IEC 61094-2:2009 -. . 2. (IEC 61094-2 Edition 2.0 2
2、009-02 Electroacoustics Mea-surement microphones Part 2: Primary method for pressure calibration of laboratory standard microphones bythe reciprocity technique). - 1.52004 ( 3.5). - , 5 61094-22001 , - . () . - , , 2013 , - - II 61094-220111 .12 13 14 .25 .25.1 25.1.1 25.1.2 .25.1.3 25.2 .35.3 .35.4
3、 .35.5 .55.6 55.7 65.7.1 .65.7.2 .66 , .66.1 .66.2 .66.3 66.4 76.5 .76.5.1 .76.5.2 .76.5.3 .76.5.4 87 87.1 87.2 .87.3 87.3.1 .87.3.2 87.3.2.1 87.3.2.2 .97.3.2.3 97.3.2.4 .97.3.3 .97.3.3.1 .9III 61094-220117.3.3.2 .107.3.3.3 107.4 107.5 10 () . . 13 B () 16 C () , - 19 D() 23 E() .25 F () .27 () 30IV
4、 61094-22011 2 State system for ensuring the uniformity of measurements. Measurement microphones. Part 2.Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique 201305011 :- ( ), - 61094-1, , -;- , - . ().2 . . , . 61094-1:2000 . 1. . (IEC 61094-1: 200
5、0 Measurement Microphones Part 1: Specifications forlaboratory standard microphones)/ 98-3 . 3. (GUM:1995)1(ISO/IEC Guide 98-3, Uncertainty of measurement Part 3:Guide to the expression of uncertainty in measurement (GUM:1995)1)3 61094-1 / - 98-3, :3.1 (reciprocal microphone): , - .3.2 (phase angle
6、of pressure sensitivity ofmicrophone): - , . : ( ).1/ 98-3:2008 - (GUM) 1995 .1 61094-22011 3.3 (electricaltransfer impedance): - -. 1 : (). 2 , 7.2 61094-1.3.4 (acoustic transfer impedance): , -, , -, . : - (ac215/3).3.5 (coupler): , .4 :- : 23,0 C;- : 101,325 ;- : 50 %.5 5.1 5.1.1 -, , , . , .5.1.
7、2 , . , , - . , - . (1), (2) (3), , .5.1.3 - -, , . - (5.1.2). -, , - . . , - . , - , , .2 61094-220115.2 , z11i +z12q =U; (1)z21i +z22q =p, p , , ();U ();q ()(3/);i , , ();z11= Ze ();z22=Za - ( c215 c2153);z12=z21= Mpc215Za - (c215 c2153);Mp (c2151). . (1) Zei +MpZaq = U; (1)MpZai + Zaq = p, ., (1)
8、 (2), Mp, 1 Mp, 2,- . (1) , i , (1), (p = 0) Mp,1c215i1 p2= Za, 12c215 Mp, 1c215 i1 (2), Za, 12 . (2) U2=Mp, 2p2=Mp, 1Mp, 2Za, 12i1., Mp, 1Mp, 2= (1/Za, 12)(U2/i1). (2)5.3 - ., - . - ( ) , ., - . , , . - .5.4 Za, 12 =p2/(Mp, 1c215i1) - 1, Za, 1 Za,2 (1) (2) .3 61094-220111 1 Za, 12 Za, 12 . , - ( , ). , , (), 2( ) Za, 12 Za,12:112Z,a=1Zva,+11Za,+12Za,= j c119VpVpVpc107c107 c107sers,rers,rc43c43c230c232c231c231c246c248c247c247,12,(3) V (3);Ve, 1 (1) (3);Ve, 2 (2) (3);Za, V= c107ps/(jc119V) , ,
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