H - Electricity – 04 – R
Patent
H - Electricity
04
R
179/39
H04R 25/00 (2006.01) A61F 11/04 (2006.01) G09B 21/00 (2006.01)
Patent
CA 1216798
ABSTRACT OF THE DISCLOSURE The invention relates to methods and devices for the transmission of acoustic information as perceivable vibrations. The invention provides for a derivation of signals from the high-frequency components by forming differential frequencies. In an instrument suited for this purpose the information can be acquired by a microphone and fed to a vibrator via a preamplifier and an output amplifier, there branching off between the amplifier components via a line a signal channel containing a high-pass filter, a stage of nonlinear characteristic, a low-pass filter and another amplifier which is connected to the output amplifier and the volume control of the instrument. The invention is particularly useful for persons with severe or even complete hearing loss to make it easier to learn to speak and to read lips.
463332
Busch Dieter
Harless Friedrich
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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