1980-02-19
1982-10-12
Stellar, George G.
179107FD, H04R 2500
Patent
active
043540643
ABSTRACT:
The present invention comprises a frequency responsive tactile stimulator. Selected mid-frequency and high frequency components are extracted from an input audio signal by a bandpass filter (18) and a high-pass filter (20). The outputs of these filters are transmitted through precision rectifiers (22, 24) and provided to modulate power drivers (26, 28). A random noise signal is generated by a noise generator (30) and limited to fixed length randomly distributed pulsed by a one-shot circuit (36). The random pulses are provided as the input to the power drivers (26, 28). The lower frequency power driver (26) drives a plurality of vibrators (42-48) which are spatially arranged on a transducer to cover a distinct area. The high frequency signal component modulates power driver (28) which drives two vibrators (50, 52) which are contiguously located to produce a punctate vibration. The use of the stimulator in accordance with the present invention together with an audio amplifier hearing aid provides the user with the ability to distinguish various high frequency signal components despite the loss of hearing for high frequency signals.
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Journal of Abnormal and Social Psychology, vol. 20, 1925 "Progress in Experiments on Interpretation of Speech by Touch" R. Gault, pp. 118-127.
Washington Star, Mar. 20, 1972 "A New Way of Hearing" J. Randal.
94th Meeting of the Acoustical Society of America, Nov. 1977, "Progress in the Development of a Tactile Aid For The Deaf" Scott et al.
Journal of Acoustical Society of America, vol. 63, No. 4, Apr. 1978, "A Method For Training And Evaluating The Reception of Ongoing Speech" Scott et al. pp. 1186-1192.
Scott Instruments Company
Stellar George G.
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