00816nam a22001217a 4500 16220 16220 IEC 60118-9:1985-Hearing aids. Part 9 : Methods of measurement of characteristics of hearing aids with bone vibrator output 1.0 Geneva : International Electrotechnical Commission, 1985. 23 p. Defines a method of expressing the input/output ratio as an acousto-mechanical sensitivity level measured on a mechanical coupler according to the second edition of IEC 60373. Provides a suitable basis for the exchange of information or for direct comparison of the electroacoustic characteristics of hearing aids using bone vibrator outputs. The methods chosen are practical and reproducible and are based on selected fixed parameters. Hearing aids ST 0 0 0 0 AIISH AIISH 2020-06-22 0 ST006 2020-06-22 00:00:00 2020-06-22 ST