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3、. ,- . 3382-1, 4. . , - . 3382-1, .IV 3382-22013 2 Acoustics. Measurement of room acoustic parameters. Part 2. Reverberation time in ordinary rooms 201412011 . - , . , , .2 . - , . 3382-1 . . 1. (ISO 3382-1, Acoustics Measurement of room acoustic parameters Part 1: Performance rooms) 18233 . (ISO 18
4、233,Acoustics Application of new measurement methods in building and room acoustics) 61260 . (IEC 61260,Electroacoustics Octave-band and fractional-octave-band filters)3 :3.1 (decay curve): - .4, 3.1 1 - - (. 5).3.2 (interrupted noise method): ( ) - .4, 3.31 3382-22013 3.3 (integrated impulserespons
5、e method): .4, 3.43.4 (impulse response): - .4, 3.5 - , - ( ) - . () , .3.5 (reverberation time) ,: , 60 . , 60 , . . , 5 25 20. 5 35 , - 30.1.6 (large room volume): , 300 2.4 4.1 -. . - , . , - . - . . , 3 - 1,5 0,8 4 . .4.2 4.2.1 . 3382-1 (.3.1, ). - . - , .4.2.2 , - :- , ;- .4.2.2.1 - 14 . 27 , 2 3382-22013 , . 1/3- 61260.4.2.2.2 ( / ) :a) ;b) ;c) . , . . ( ) /30. T/12, . , , 1,5 . , 45. 1 4,34 = 10lg(e), /. 2 , - , . 3 , , T/30. T/12. - . - - .4.2.2.3 . .4.3 4.3.1
