BS EN 60601-2-66. Electroacoustics. Part 2-66. Hearing instruments and hearing systems. General requirements for basic safety and essential performance
BS EN 60601-2-66. Electroacoustics. Part 2-66. Hearing instruments and hearing systems. General requirements for basic safety and essential performance
Acoustics. Reference zero for the calibration of audiometric equipment-Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones