GOST R 8 751-2011 State system for ensuring the uniformity of measurements Measurement microphones Part 7 Values for difference between free-field and pressure sensitivity levels o.pdf

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1、 7 IEC/TS 61094-7:2006Measurement microphones Part 7: Values for differencebetween free-field and pressure sensitivity levelsof laboratory standard microphones(IDT) 8.7512011/IEC/TS 61094-7:2006 27 2002 . 184- , 1.02004 . 1 - - () - , 42 3 - 13 2011 . 1078-4 /T 61094-7:2006 - . 7. - (IEC/TS 61094-7:

2、2006 Measurement microphones Part 7: Values fordifference between free-field and pressure sensitivity levels of laboratory standard microphones). - 1.52004 ( 3.5). - , 5 - , - . () . - , , 2013 , - - II 8.7512011/IEC/TS 61094-7:20061 12 13 14 25 26 .26.1 .26.2 .26.3 . . . 26.4 3 () 5 () .6 () 7 () 8

3、 8.7512011/IEC/TS 61094-7:2006III 7 State system for ensuring the uniformity of measurements. Measurement microphones. Part 7. Values for differencebetween free-field and pressure sensitivity levels of laboratory standard microphones 201305011 :- ( -) , 61094-1, - , ;- - 0 , - ;- ;- .2 . - . . - ( )

4、. 61094-1:1995 . 1: - (IEC 61094-1:1995, Measurement Microphones Part 1: Specificationsfor laboratory standard microphones) 61094-2:1992 . 2: (IEC 61094-2:1992, MeasurementMicrophones Part 2: Primary method for pressure calibration of laboratory standard microphones by thereciprocity technique) 6109

5、4-3:1995 . 3: - (IEC 61094-3:1995,Measurement Microphones Part 3: Primary method for free-field calibration of laboratory standardmicrophones by the reciprocity technique)3 61094-1, 61094-2 61094-3, :3.1 (zero-degrees incidence): - .1 8.7512011/IEC/TS 61094-7:20064 : .23,0 ; 101,325 ; 50%.5 , - :- ;

6、 - ;- ; - . - , 61094-2 61094-3, - . .6 6.1 - (. 61094-3, 5.4):- . - , ;- - . , . - , , . LS2 .6.2 - , . , . , 6.3.6.3 , . , - . - , . c68ff, , 0 :c68ff= c1R1(f, t)+c2R2(f, t)+c3R3(f, t)+cnRn(f, t), (1) R(f, t)=f2961527315,t c43;2 8.7512011/IEC/TS 61094-7:2006f, ;t, ;n , 1. (1) , -, - . (. 61094-2,

7、6.5). , 1, (1) 200 12,5 LS1, 400 25 LS2. 0,01 , . - 1. , (1), 0,05 , ., (1) , 2 - LS1 LS2.6.4 - (1), , :- ;- (. .1);- 0,05 (. 6.3). 1 0 LS1( ) LS21 0,0077 0,038220,3116 0,104943 0,05626 0,01291840,020861 0,00210585 0,0046561 0,000218560,00048413 1,189645 c2151057 2,37215 c215105 3,4809 c21510784,471

8、 c2151075,23803 c21510990 3,19642 c21510113 8.7512011/IEC/TS 61094-7:2006 2 - , , 0, (1), LS1 ( ) LS2, , 18 23 28 33 18 23 28 330,500 0,069 0,068 0,067 0,066 0,006 0,006 0,005 0,0050,630 0,109 0,108 0,106 0,104 0,015 0,015 0,014 0,0140,800 0,174 0,172 0,169 0,166 0,032 0,031 0,030 0,0291,000 0,269 0

9、,264 0,260 0,256 0,057 0,056 0,055 0,0531,250 0,412 0,406 0,399 0,393 0,097 0,096 0,094 0,0921,600 0,661 0,650 0,640 0,630 0,169 0,166 0,163 0,1602,000 0,1010 0,994 0,978 0,963 0,272 0,267 0,263 0,2582,500 1,538 1,514 1,490 1,467 0,429 0,422 0,415 0,4083,150 2,360 2,323 2,288 2,254 0,679 0,667 0,657

10、 0,6464,000 3,602 3,550 3,500 3,451 1,076 1,058 1,041 1,0255,000 5,158 5,093 5,029 4,966 1,637 1,612 1,587 1,5636,300 7,008 6,940 6,873 6,807 2,500 2,462 2,425 2,3908,000 8,664 8,617 8,569 8,522 3,788 3,734 3,682 3,63210,00 9,463 9,448 9,432 9,416 5,376 5,309 5,245 5,18112,50 9,210 9,254 9,293 9,328

11、 7,152 7,086 7,021 6,95616,00 8,721 8,683 8,645 8,60620,00 9,138 9,141 9,144 9,14425,00 8,714 8,738 8,761 8,7844 8.7512011/IEC/TS 61094-7:2006 () . .1 - , , . , 0 (zero-degrees incidence)., , , - 2.1 , , . - , .2 - . , , - .3 4160 4180 Brc104el , (DTU), ; (JQAO), ; (LNM), ; (NPL), ;- (PTB), .6 8.7512011/IEC/TS 61094-7:2006 () 655 (1979), , -