ISO 226:1987 EN 0dc1ce39
Acoustics — Normal equal-loudness level contours
废止
发布日期 :
1987-05-07
实施日期 :
ISO 389-7:2005/Amd 1:2016 EN be0c0014
Acoustics — Reference zero for the calibration of audiometric equipment — Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions — Amendment 1: Reference threshold of hearing at 20 Hz and 18 000 Hz under free-field listening conditions and at 20 Hz under diffuse-field listening conditions
废止
发布日期 :
2016-07-12
实施日期 :
ISO/TR 4870:1991 EN 2607bc6b
Acoustics — The construction and calibration of speech intelligibility tests
废止
发布日期 :
1991-12-18
实施日期 :