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Think DigitalThink FONIX 6500-CX Hearing Aid Test SystemJust as digital hearing aids have grown in number and in popularity, Frye Electronics has grown to meet the challenge of testing them. Last year we introduced the DSIN (Digital Speech in Noise) test for coupler/sound chamber measurements. Now the DSIN program is available in the Quik-Probe Option so you can see precisely how all digital aids function in your client's ear, as well as in the sound chamber. How does it work?While some digital hearing aids can be tested successfully with our standard composite signal, many aids interpret any continuous signal as noise, which can invalidate the test. A randomly interrupted signal is needed for ease of use and repeatability. Our Digital Speech program provides a choice of two randomly interrupted signals. The first employs the ICRA* speech spectrum (based on a CD containing sounds from multiple languages that was used in developing the Widex Senso hearing aid). The second signal is a variation of the ANSI '92 signal, a more traditionally based speech spectrum that is less susceptible to environmental noise. You can look at the hearing aid curve using the random burst signal alone, or you can test the filtering action of the aid by introducing your choice of pure tone bias signals.
Simple fitting protocolPut probe mic in place immediately. Check for adequate gain using prescriptive fit and client's ear response. Monitor digital aid's processing for soft, normal and loud speech. Additional software improvements
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