This part of ANSI/ASA S3.55 / IEC 60318 describes an acoustic coupler for loading an earphone or
hearing aid with a specified acoustic impedance when determining its physical performance
characteristics, in the frequency range 125 Hz to 8 kHz. It is suitable for air conduction hearing aids
and earphones, coupled to the ear by means of ear inserts e.g. ear molds or similar devices.
The sound pressure developed by an earphone is not, in general, the same in the coupler as in a
person's ear. However, it can be used as a simple and ready means for the exchange of specifications
and of physical data on hearing aids and for the calibration of specified insert earphones used in
audiometry.
| ANSI : | ANSI Approved |
| File Size : | 1
file
, 790 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 20 |
| Published : | 07/21/2014 |
