Vibratory aid for presbycusis
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United States of America Patent
Stats
-
Oct 12, 1982
Grant Date -
N/A
app pub date -
Feb 19, 1980
filing date -
Feb 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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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