Audio signal reproducing device

Details Audio signal reproducing device Audio signal reproducing device

1994-10-27

1996-07-16

Isen, Forester W.

Electrical audio signal processing systems and devices

Including frequency control

Automatic tone control

381103, 381108, H03G 900

Patent

active

055376681

ABSTRACT:
In a reproducing device, e.g., in the portable tape player, the sound leakage from earphones is effectively avoided by directly detecting the signal level of medium to high frequency sounds at the earphone, and suppressing the signal level depending on the detected result thereof, so that the deterioration in sound quality is prevented and the sound leakage is effectively reduced.

REFERENCES:
patent: 3571529 (1971-03-01), Gharib
patent: 5050214 (1991-09-01), Lee
Zenith, "The Heritage," advertising brochure, circa 1969.

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