What is BS EN 60318-3-Acoustic coupler for the calibration of supra-aural earphones about?
BS EN 60318 is a European standard on electroacoustics that discusses the simulators of human head and ear to improve the acoustical performance of the supra-aural earphones.
BS EN 60318-3 is the third part of the BS EN 60318 series that specifies an acoustic coupler for the measurement of supra-aural audiometric earphones in the frequency range from 125 Hz to 8 000 Hz.
The sound pressure developed by an earphone is not, in general, the same in the coupler as in a person's ear. However, the acoustic coupler can be used as an objective and reproducible means of measuring the output of supra-aural earphones. It can be used for specifying reference equivalent threshold sound pressure levels (RETSPL) for the calibration of audiometers.
Who is BS EN 60318-3-Acoustic coupler for the calibration of supra-aural earphones for?
BS EN 60318-3 on acoustic coupler for the calibration of supra-aural earphones is useful for:
- Acoustic coupler manufacturers
- Acoustic coupler tester
- Occupational health and safety departments
- Quality assurance departments
Why should you use BS EN 60318-3-Acoustic coupler for the calibration of supra-aural earphones?
An acoustic coupler is a device for measuring the acoustic output of sound sources where the sound pressure is measured by a calibrated microphone coupled to the source by a cavity of predetermined shape and volume which does not necessarily approximate the acoustical impedance of the normal human ear.
BS EN 60318-3 provides you guidance with the construction, cavity dimensions, static pressure equalization, calibrated pressure type microphone, coupling of the earphone to the acoustic coupler and method of calibration. This will help you in calibration of supra-aural earphones used in audiometry.
The dimensions and methods provided by BS EN 60318-3 assist you in improving the performance and quality of the acoustic coupler and ensuring the accuracy of supra-aural earphones.
With obedience and compliance to BS EN 60318-3, you can enhance the quality of the acoustic coupler and manufacture a standardized high-quality product.
