Patent ID: 8121303

Claim:
A stethoscope capable of eliminating unwanted sounds, comprising: a stethoscope head, further comprising: a microphone, for gathering an auscultatory sound; and a sensor, for detecting and determining whether the stethoscope head is moving toward a specific position and whether the stethoscope head is located at a specific position for an auscultatory process to be performed, and for detecting and determining whether the stethoscope is moving toward a specific position; a signal processing circuit, connected to the stethoscope head for processing the auscultatory sound signal being gathered, further comprising: an operational amplifier with a recording circuit, for amplifying the auscultatory sound signal being gathered; a low-pass filter, for filtering out unwanted sound signals from the amplified auscultatory sound signal being gathered; an accentuator, for emphasizing characteristics of a frequency band of the low-pass filtered auscultatory sound signal being gathered; and a micro processor, for controlling the operations of the operational amplifier with the recording circuit, the low-pass filter, the accentuator, the sensor, and the microphone while connecting directly connected to the operational amplifier, the recording circuit, the low-pass filter, the accentuator, the sensor, and the microphone for controlling operation of the microphone; and a headset, connected to the signal processing circuit, for transmitting the auscultatory sound signal processed thereby to a user to be employed in the auscultatory process; wherein, the micro processor is polling a detection of the sensor actively at any time for using the result of the detection of the sensor to automatically control start or stop of the gathering of the auscultatory sound by the microphone based on the result of the detection of the sensor.