Haldimand-Norfolk Hearing Clinic

Learning Centre - Hi-tech Hearing Aids

Digital Signal Processing or DSP is one of the newest technologies in the hearing aid industry today. It is expected that DSP circuitry will result in dramatic improvements in sound reproduction for the hearing impaired by enabling frequency responses to be sculpted more precisely to each individual hearing loss and individual preferences for listening as well as adding increased potential for the reduction of background interference.

The ABC's of Analog and DSP

Almost all hearing aid circuitry today is analogue. Analog circuits attempt to faithfully replicate a sound wave form using electronics. In other words the electrical representation of the sound wave is analogous to the sound input. Technological advancements for analog circuitry now offer a wide variety of controls to manipulate sound output.

However, analog circuits still do not offer the precision of a digital circuit. Digitally programmable hearing aids should not be confused with true digital hearing aids. This confusion arises because some of these programmable hearing aids happen to be programmed on a computer. True digital hearing aids have an Analog-to Digital (A/D) and a Digital -to-Analog (D/A) convertor in the signal path. - to further review hearing aid technology and what may be best for you contact your hearing health care professional.


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Haldimand-Norfolk Hearing Clinic
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