000 00495nam a22001337a 4500
999 _c2976
_d2976
003 OSt
005 20181019143725.0
008 181019b ||||| |||| 00| 0 eng d
040 _cNational Acoustics Laboratories
110 _aInternational ElectroTechnical Commission
245 _aCEi IEC 60318-3. Electroacoustics - Simulators of human head and ear. Part 3: Acoustics coupler for the calibration of supra -aural earphones used in audiometry
260 _aGeneva
_bISO
_c1998
942 _2udc
_cBOOK