DIN EN ISO 389-2 (1996-10)现行
Reference zero for the calibration of audiometric equipment Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994)
出版：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
UNE EN ISO 389-2:1997 - Identical
SS EN ISO 389-2 Ed. 1 (1996) - Identical
ISO 389-2:1994 - Identical
NS EN ISO 389-2 Ed. 1 (1996) - Identical
NF EN ISO 389-2:1996 - Identical
I.S. EN ISO 389-2:1997 - Identical
UNI EN ISO 389-2:1997 - Identical
NBN EN ISO 389-2:1996 - Identical
ONORM EN ISO 389-2:1997 - Identical
BS EN ISO 389-2:1997 - Identical
NEN EN ISO 389-2:1996 - Identical
SN EN ISO 389-2:1997 - Identical
