1、 , ()INTERSTATE COUNCIL FOR STANDARDIZATION, METROLOGY AND CERTIFICATION(ISC) N290532011 (N 29053:1993, IDT) , - 1.092 . - 1.01-012009 . 1 , 42 465 3 - , - () ( 1 38 18 2011 .) : (IS 3166) 00497 (IS 3166) 00497 ZAMKZKGMDRUUA - - o - 4 N 29053:1993Acoustics Materials for acoustical applications Deter
2、mination of airflow resistance (. -, . ). - 1.5 ( 3.6). (en). (IDT)5 17 2012 . 47- N 290532011 1 2012 .6 ()-. (), .- , 2012 -, II N 2905320111 .12 13 23.1 ( ) 23.2 ( ) 24 .34.1 , .34.1.1 .44.1.2 , .44.1.3 44.1.4 44.2 , .44.2.1 .64.2.2 , 64.3 .75 75.1 .75.2 .75.2.1 .75.2.2 .75.3 .76 .77 .88 .8 9III N
3、 290532011 , , - , , .IV N 290532011 Acoustical materials. Methods for determination of airflow resistance 201209011 , , . . .2 :2.1 (airflow resistance) R, c215 /3: , R =c68pqv, c68p , , , ;qv , , 3/.2.2 (specific airflow resistance) Rs, c215 /: - , Rs= R c215 A, R , c215 /3;A , , 2.2.3 ( ) (airflo
4、w resistivity) r, c215 /2: , - r =Rds, Rs , c215 /;d , .1 N 290532011 2.4 (linear airflow velocity) u,/: , u =qAv,qv ,3/; ,2.3 3.1 ( )-,(.1).1 3.2 ( ) , - , ,(.2).2 N 290532011 2 ( ) 4 4.1 , ) , .b) , .) .d) , .) , . 3. 3 3 N 2905320114.1.1 -. 3. , - 95 . , , . 90 . , - , . 100 . ( , - ) . , 50 % .
5、3 . , , . - , .4.1.2 , , , . , ( . .), , , ., , . , - . , 0,5 c215 103/.4.1.3 ,. c177 5% .4.1.4 -, 0,1 , c177 5 % .4.2 , ) , .b) , .) , - .d) , . - 4 5.4 N 290532011 4 , , , ( ) 5 ( )5 N 2905320114.2.1 :) ;b) (. 4 5). . , 95 . -. 90 . . ( , -). . ( ) - 50 % . 3 . , , . - ( , ) 1 % .4.2.2 , , - 2 . qVr.m.s,3/, qVr.m.s=c1122f c215 h c215 Ap,(1) f , ;h ( ), ;Ap , 2. ur. m. s, /, ur.m.s=qAVr ms,(2) qVr.m.s , 3/; , 2. ur. m. s 0,5 4 /. -, . , , . . . -, peff, , peff= 1,4pVVpk02c215 ,(3) 0 , ;Vpk , 3;V , 3. . , c215 /. 10 , 5 .6 N 290532011 , 2 .4.3
