H - Electricity
04
R
H04R 25/00 (2006.01) H03K 3/0231 (2006.01)
Patent
CA 2099236
ABSTRACT OF THE DISCLOSURE In a hearing aid having an input transducer (2), a useful signal processor (4 through 9) having an output stage (9), and an output transducer (11), whereby a first time-discrete useful signal processing is provided preceding the output stage (9), and controlled by a sampling signal, a second time-discrete useful signal processing different therefrom is simultaneously employed without disturbing influences. To that end, a second time-discrete useful signal processing with a pulse-duration modulation is provided in the output stage (9), this being formed by a delta signal, whereby the sampling signal and the delta signal are derived from only one oscillator (12).
Martin Raimund
Pfannenmuller Gerhard
Fetherstonhaugh & Co.
Siemens Audiologische Technik Gmbh
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