Recording/reproducing apparatus with selective attenuation...

G - Physics – 11 – B

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179/16, 352/20

G11B 5/00 (2006.01) H04H 60/04 (2009.01) G11B 31/00 (2006.01) H04S 7/00 (2006.01)

Patent

CA 1140476

SO1305 RECORDING/REPRODUCING APPARATUS WITH SELECTIVE ATTENUATION OF REPRODUCED SIGNALS TO FACILITATE COMPREHENSION OF EXTERNAL SPEECH SIGNALS ABSTRACT OF THE DISCLOSURE Apparatus is provided wherein signals which are reproduced from a record medium and which are supplied to head-phones are selectively attenuated and, concurrently, audio electrical signals produced by a microphone are super imposed onto these attenuated signals. An attenuator is coupled between a record/playback transducer and an amplifier; and a switch exhibits a first condition to short- circuit the attenuator, and a second condition to enable the attenuator to attenuate the signals reproduced by the record/playback transducer and also to superimpose the audio electrical signals produced by the microphone onto the attenuated signals. In one embodiment, a record/reproduce selector selectively establishes either a recording mode, whereby the audio electrical signals produced by the microphone are amplified and supplied to the record/playback transducer, or a reproducing mode, whereby the signals reproduced from the record medium by the record/playback transducer are supplied to the amplifier. -i-

352769

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