Acoustics
Subtitle: determination of sound power levels of noise sources; engineering methods for free-field conditions over a reflecting plane = Acoustique : détermination des niveaux de puissance acoustique émis par les sources de bruit....
Series: ISO; 3744-1981(E)
Publisher: ISO
Published: 1981
Place of publication: [Geneva]
Language: eng
Notes: '...cancels and replaces ISO Recommendation R495-1966' - foreword.

Cover title.