ISO 8798:1987被替代
Acoustics - Reference Levels For Narrow Band Masking Noise
出版：International Organization for Standardization
专家解读视频
Describes calibration of one-third and one-half octave narrow-band masking noise from earphone in pure tone audiometry.
NF EN 28798:1992 - Identical
UNE 74115:1993 - Identical
DIN EN 28798 (1992-03) - Identical
I.S. EN 28798:1992 - Identical
UNI EN 28798:1993 - Equivalent
BS 7113:1989 - Identical
UNE 74155:1993 - Identical
