G - Physics – 10 – L
Patent
G - Physics
10
L
179/2, 354/47
G10L 21/00 (2006.01)
Patent
CA 1045718
ABSTRACT OF THE DISCLOSURE According to the present invention, a system for audibly recognizing a received signal which is aurally unclass- ifiable because it is too short or too long in its duration and/or its frequency band is too wide or too narrow, comprises a signal- storage device such as a magnetic tape recorder/reproducer and motor means for driving the tape at one speed during recording or storage of a received signal and at a different speed, for example a lower speed, during reproduction or retrieval of the signal therefrom. The storage device has means for storing the signal therein as received and means for retrieving the signal from the storage device at a time-rate different from the storing rate, for example a slower rate. Coupled to the tape unit are a plurality of narrow band-pass filters collectively spanning the frequency band of the signal retrieved from the storage device, a plurality of tone generators of audibly distinguishable frequencies, and means responsive to the amplitude of the signal output of each of the filters for individually adjusting the amplitude of the signal output of a corresponding one of the tone generators, thus deriving from the signal retrieved from the tape unit a plurality of signals each of a duration and frequency band within the range of audible recognition. The system further includes an output circuit, such as a sound transducer, coupled collectively to the tone generators.
229981
General Signal Corporation
Na
LandOfFree
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