CEi IEC 60318-3. Electroacoustics - Simulators of human head and ear. Part 3: Acoustics coupler for the calibration of supra -aural earphones used in audiometry
CEi IEC 60318-3. Electroacoustics - Simulators of human head and ear. Part 3: Acoustics coupler for the calibration of supra -aural earphones used in audiometry
- Geneva ISO 1998