Acoustics - hearing protectors: part 1 : subjective method for the measurement of sound attenuation (ISO 4869- 1 : 1990, IDT).

Acoustics - hearing protectors: part 1 : subjective method for the measurement of sound attenuation (ISO 4869- 1 : 1990, IDT). - Putrajaya Department of Standards Malaysia 2004. - iii, 7p. ill. 30cm - MS ISO 4869- 1 : 2004 .


Standardization--Malaysia

MS ISO 4869- 1 2004