Binary system for generating sound

Details Binary system for generating sound Binary system for generating sound

1989-05-16

1991-10-01

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

Monitoring/measuring of audio devices

Loudspeaker operation

341169, 3645135, G10L 500

Patent

active

050540866

ABSTRACT:
In a binary system for generating sound, digital signals representing an audio analog signal are stored in memory, a first voltage level is produced for a time t.sub.1 proportional to the value of a respective stored digital signal, and a second voltage level is produced for a time t.sub.2 =t.sub.c -t.sub.1, where t.sub.c is a fixed clock signal time interval. The first and second voltage levels are successively supplied to a speaker to operate the speaker in a type of frequency modulated mode to produce sound corresponding to the audio analog signal.

REFERENCES:
patent: 3816660 (1974-06-01), Nishiyama
patent: 4387269 (1983-06-01), Hashimoto et al.
patent: 4559602 (1985-12-01), Bates
patent: 4700362 (1987-10-01), Todd

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