Active attenuation system for medical patients
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United States of America Patent
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May 24, 1994
Grant Date -
N/A
app pub date -
Jun 11, 1990
filing date -
Sep 18, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus and method of actively cancelling undesirable acoustic noise generated by a patient diagnosing apparatus during a diagnosis operation which includes a remotely located active noise cancellation unit. The undesirable acoustic noise is transferred via hollow tubes from the patient diagnosing apparatus to the remote location to be detected thereat. A control unit thereafter generates cancellation waves based upon the detected undesirable acoustic noise. The cancellation waves are transferred to the patient area via additional hollow tubes to cancel the undesirable acoustic noise. The use of hollow tubes of non-magnetic, non-metallic material ensures that the undesirable acoustic noise and the cancellation waves do not interfere with the diagnosis of operation.
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