Electrical audio signal processing systems and devices – Sound effects – Reverberators
Patent
1994-09-08
1997-03-18
Tran, Sinh
Electrical audio signal processing systems and devices
Sound effects
Reverberators
381 68, 381 684, H04K 2500
Patent
active
056130082
ABSTRACT:
In a hearing aid comprising an input transducer, processing circuits for useful signals including an output stage and an output transducer, the useful signals are sampled with a sampling frequency before the output stage, are converted into data words, and are also processed in discrete-time fashion. The digital data words are capable of being converted into pulse-duration-modulated signals without being reconverted into analog signals. For this purpose, the processed data words can be read into a counting circuit via at least one input which can be placed into an initial condition with counting pulses after every read-in data word. The output stage is designed as a switching amplifier and is driven with an output signal of the counting circuit.
REFERENCES:
patent: 4187413 (1980-02-01), Moser
patent: 4592087 (1986-05-01), Killion
patent: 4689819 (1987-08-01), Killion
patent: 5055708 (1991-10-01), Sugawara
Siemens Audiologische Technik GmbH
Tran Sinh
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