ISO 389-8:2004 PDF

Scope: This standard specifies pure tone reference equivalent threshold sound pressure levels (RETSPLs) in the frequency range 125 Hz to 8 000 H2, applicable to air conduction audiometry equipment equipped with a special type of over-the-ear headphones (SENNHEISER HDA 200) calibration. Note: Instructions and test conditions for deriving the reference equivalent threshold sound pressure level for HDA 200 over-ear headphones are given in Appendix A and the references. Appendix B gives the sound attenuation of this over-ear headphone. Appendix C gives the free-field equivalent output correction values of headphones of Class A-E and Class B-E speech audiometers (see GB/T 7341.2).

ISO 389-8:2004 Referenced Document

GB/T 4854.1 Acoustics-Reference zero for the calibration of audiometric equipment-Part 1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones*， 2004-05-13 Update
GB/T 7341.2 Audiometers. Part 2: Equipment for speech audiometry
GB/T 7584.1 Acoustics-Hearing Protectors Part 1:Subjective method for the measurement of sound attenuation*， 2004-05-13 Update
IEC 60318-1:1998 Electroacoustics - Simulators of human head and ear - Part 1: Ear simulator for the calibration of supra-aural earphones
IEC 60318-2:1998 Electroacoustics - Simulators of human head and ear - Part 2: An interim acoustic coupler for the calibration of audiometric earphones in the extended high-frequency range

2004 ISO 389-8:2004 Acoustics - Reference zero for the calibration of audiometric equipment - Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones