1、 12354-42012 4 EN 12354-4:2000Building acoustics Estimation of acoustic performance of buildings from theperformance of elements Part 4:Transmission of indoor sound to the outside(IDT) 1 - ( ) - , 42 358 3 29 2012 . 1385-4 12354-4:2000 . . 4. (EN 12354-4:2000 Building acoustics Estimation of acousti
2、cperformance of buildings from the performance of elements Part 4: Transmission of indoor sound to theoutside). - - , 5 1.02012 ( 8). ( 1 ) , -. () . , - - , 2014 , - - II 12354-420121 12 13 24 .34.1 .34.2 44.3 44.4 . 54.5 65 .6 () 7 B () 8 () 9 D () 10 () . . 11 F () 13 G () 14 () ( ) 19 20III 1235
3、4-42012 4 Building acoustics. Estimation of acoustic performance of buildings from the performance of elements. Part 4.Transmission of indoor sound to the outside 201312011 , - , , . - , . -, , . - . - . , - , . - -.2 . - , . 140-3* . . 3. (EN ISO 140-3,Acoustics Measurement of sound insulation in b
4、uildings and of building elements Part 3: Laboratorymeasurement of airborne sound insulation of building elements) 140-5 . . 5. (EN ISO 140-5,Acoustics Measurement of sound insulation in buildings and of building elements Part 5: Fieldmeasurements of airborne sound insulation of facade elements and
5、facades)* 140-3, 20140-10 10140 (- 15), 10140 ( 15). , .1 12354-42012 20140-10* . . 10. (EN 20140-10, Acoustics Measurement of sound insulation in buildings and of buildingelements Part 10: Laboratory measurement of airborne sound insulation of small building elements) 7235 . . , - (EN ISO 7235, Aco
6、ustics Laboratory measurementprocedures for ducted silencers and air-terminal units Insertion loss, flow noise and total pressure loss)3 .3.1 , 3.1.1 (sound power level) Lw, : .3.1.2 (directivity correction) Dc, : .3.2 3.2.1 (sound reduction index) R, : -, 140-3* 140-5.3.2.2 (element normalized leve
7、l difference) Dn, e,: , 20140-10*.3.2.3 (insertion loss of an element) D, : - , - , 7235. , , .3.2.4 :- ;- .3.3 3.3.1 (sound pressure level) Lp, : , , / , - ( , - ). *.3.3.2 , (totalattenuation due to propagation) Atot, : d , , - , , .2 12354-42012* 140-3, 20140-10 10140 (- 15), 10140 ( 15). , .* 10
8、140-2.* . .3.3.3 (diffusivity term) Cd, : - 1 2 - . Cd= 6 . 0 6 .3.3.4 (inside sound pressure level) Lp, in,: 1 2 - . .3.3.5 (substitute point source): , - , . - .4 4.1 , - , :- , - ;- , , ;- ( , , - , , )., , . . - , , - . , , . . , . Lp= Lw+ Dc Atot, (1) Lp - , ;Lw , ;Dc , ;Atot - , . , , :- ;- , . . , , - -. , 3 12354-42012 . , - . , , Atot, , . - . 6, A. , - , , , - , , . .4.2 , , :- , . . , , , , , 1 2(, );- 1 2 ,
