KS A ISO 21727-2010 Cinematography－Method of measurement of perceived loudness of motion-picture audio material《电影摄影 电影音频材料的感觉级音量测量方法》.pdf

1、 KSKSKSKSKSKSKSK KSKSKS KSKSK KSKS KSK KS KS A ISO 21727 KS A ISO 21727:2010 2010 12 28 http:/www.kats.go.krKS A ISO 21727:2010 : ( ) ( ) ( ) : (http:/www.standard.go.kr) ： ：2010 12 28 2010-0661 ： ： ( 02-509-7278) (http:/www.kats.go.kr). 10 5 , . KS A ISO 21727:2010 Cinematography Method of measurem

2、ent of perceived loudness of motion-picture audio material 2004 1 ISO 21727, Cinematography Method of measurement of perceived loudness of motion-picture audio material , . 1 KS A ISO 2969 . , (weighting) . A . 2 . . ( ) . KS A ISO 2969, B 3 . 3.1 50 % 20 dB( - ), 185 nW/m . (average responding mete

3、r) . 100 % 838.2 m(0.033 in) . KS A ISO 21727:2010 2 3.2 20 Hz 20 kHz 3.3 20 Hz 20 kHz 1/3 0.5 dB (Gaussian probability distribution) 3.4 (C- ) , 85 dB(20 Pa C- ) 85 dB(C- ) . 3.5 M- (M-type frequency weighting) 1 . 1 (background noise) ITU (International Telecommunications Union) . 2 . KS A ISO 217

4、27:2010 3 1 M- Hz (gain) dB dB 31 35.5 2.0 63 29.5 1.4 100 25.4 1.0 200 19.4 0.85 400 13.4 0.7 800 7.5 0.55 1 000 5.6 0.5 2 000 0.0 0.5 3 150 3.4 0.5 4 000 4.9 0.5 5 000 6.1 0.5 6 300 6.6 0.0 7 100 6.4 0.2 8 000 5.8 0.4 9 000 4.5 0.6 10 000 2.5 0.8 12 500 5.6 1.2 14 000 10.9 1.4 16 000 17.3 1.65 20

5、000 27.8 2.0 31 500 48.3 2.8 4 4.1 4.2 1 . . 1 4.2 4.2.1 M- ( ) M- KS A ISO 21727:2010 4 M- . 1 20 Pa . 2 6 2 . 2 6 a dB (left) 85 (center) 85 (right) 85 (left surround) 82 (right surround) 82 (sub-woofer) 85 a20 Pa C- 4.2.2 M- . (phase) (scalar) , , , . 4.2.3 - (loudness-equivalent level) ( ) . 4.2

6、.4 , x M- . )M(eq010dBLlog20=ppx p ： 4.2.3 p0： 20 Pa KS A ISO 21727:2010 5 A ( ) , 2 dB 3 dB . 8 dB 12 dB . . 2 dB 3 dB . 8 dB 12 dB . 4. . 82 dBLeq(M) , 88 dBLeq(M) . KS A ISO 21727:2010 6 1 KS A ISO 22234： 2003, , 2 BS 5550-7.4.1： 1990, Cinematography Part 7： Production and presentation Section 7.

7、4： Sound Subsection 7.4.1： Specifications and measurements for the B-chain electro-acoustic response of motion-picture control rooms and indoor theatres 3 BS 5550-7.4.2： 2000, Cinematography Part 7： Production and presentation Section 7.4： Sound Subsection 7.4.2： Specification for maximum recording

8、levels for commercials and trailers 4 IEC 61260： 1995, Electroacoustics Octave-band and fractional-octave-band filters 5 KS C IEC 61672 1： 2005, 1： 6 KS C IEC 61672 2： 2005, 2： 153787 1 92 3(13) (02)26240114 (02)262401489 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS A ISO 21727:2010KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Cinematography Method of measurement of perceived loudnessof motion-picture audio material ICS 37.060.99