BS EN 60118-9. Electroacoustics. Hearing aids. Part 9. Methods of measurement of the performance characteristics of bone conduction hearing aids— 27 стр.
Electroacoustics. Hearing aids. Methods of measurement of performance characteritics of hearing aids under simulated in situ working conditions— 36 стр.
Electroacoustics. Hearing aids. Measurement of the performance characteristics of hearing aids for production, supply and delivery quality assurance purposes— 26 стр.