Electroacoustics - Simulators of human head and ear - Part 8: Acoustic coupler for high-frequency measurements of hearing aids and earphones coupled to the ear by means of ear inserts (IEC 60318-8:2022)
This part of IEC 60318 describes an acoustic coupler for loading a hearing aid or insert
earphone with a specified acoustic impedance when testing its acoustic performance, in the
frequency range up to 16 kHz. It is suitable for air-conduction hearing aids and earphones,
coupled to the ear by means of ear inserts, earmoulds or similar devices.
The acoustic coupler does not simulate the human ear. However, it has an effective volume of
only 0,4 cm3, which is small enough not to produce significant resonances in the coupler in the
frequency range below 16 kHz. Therefore, it will load the earphone with a known acoustic
impedance, which allows repeatable measurements with low uncertainty to be obtained on
earphones used in extended high-frequency audiometry.
ΚΩΔΙΚΟΣ ΠΡΟΪΟΝΤΟΣ:
CYS EN IEC 60318-8:2022
This part of IEC 60318 describes an acoustic coupler for loading a hearing aid or insert
earphone with a specified acoustic impedance when testing its acoustic performance, in the
frequency range up to 16 kHz. It is suitable for air-conduction hearing aids and earphones,
coupled to the ear by means of ear inserts, earmoulds or similar devices.
The acoustic coupler does not simulate the human ear. However, it has an effective volume of
only 0,4 cm3, which is small enough not to produce significant resonances in the coupler in the
frequency range below 16 kHz. Therefore, it will load the earphone with a known acoustic
impedance, which allows repeatable measurements with low uncertainty to be obtained on
earphones used in extended high-frequency audiometry.
