ISO 10847:1997 EN b805352a
Acoustics — In-situ determination of insertion loss of outdoor noise barriers of all types
现行
发布日期 :
1997-07-24
实施日期 :
ISO 11821:1997 EN 04655305
Acoustics — Measurement of the in situ sound attenuation of a removable screen
现行
发布日期 :
1997-03-27
实施日期 :
IEC 61012:1990 EN-FR 8bab7584
Filters for the measurement of audible sound in the presence of ultrasound
现行
发布日期 :
1990-01-31
实施日期 :