Apparatus and method for producing structural and acoustic vibrations
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United States of America Patent
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Aug 12, 1997
Issued Date -
N/A
app pub date -
Jan 26, 1995
filing date -
Dec 4, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
A self-exciting vibratory device for producing vibration signals in a housing includes actuator means (12) attached to housing (16), sensor means (14) attached to housing (16) and electronics module (18) connecting actuator means (12) and sensor means (14). Actuator means (12) creates vibration signals within housing (16). Sensor means (14) senses the vibration signals created by actuator means (12). Electronics module (18) amplifies and phase shifts the vibration signals sensed by sensor means (14) and containing resonant modes of vibration of housing (16). Electronics module (18) then supplies these amplified, phase shifted signals to actuator means (12) to enhance the vibration of housing (16) at the dominant mode of vibration of housing (16).
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