Electroacoustics - Audio-frequency induction loop systems for assisted hearing -- Part 1: Methods of measuring and specifying the performance of system components
€71.00
Electroacoustics - Measurement microphones -- Part 2: Primary method for pressure calibration of laboratory standard microphones by the reciprocity technique
€90.00
Measurement microphones. Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison
€79.00
Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids
€89.00
Electroacoustics - Hearing aids - Part 4: Induction-loop systems for hearing aid purposes - System performance requirements
€104.00
€60.00
