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DARREL HUNSAKER, MD
San Diego, Calif

Arch Otolaryngol Head Neck Surg. 1991;117(7):709.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

During the Western Section meeting of the Triologic Society in Santa Barbara, Calif, on January 21, 1991, Robert E. Sandlin, PhD, discussed the forms of digital hearing-aid circuits. Fully digitized hearing aids are commercially available but not popular. Each pulse of the input signal is converted to a digital code, as in audio compact disk technology. These coded, digitized bits are acted on by a microprocessor that shapes the output signal of the hearing aid dependent on customized programming. The reasons for failure of this system are several: (1) power consumption is high and expensive; (2) the hearing aid is cumbersome, with both a large ear-level device and a belt-worn microprocessor; and (3) with these disadvantages, the acoustic advantages of the system are not sufficient to gain acceptance over analog hearing aids.

The digital technology that is being accepted is a hybrid system utilizing digital commands to control the behavior . . . [Full Text PDF of this Article]

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