| 摘要 |
<p>A pickup system (10) utilizes both sound pressure disturbances sensed by a microphone (20) and bone conduction sensed by a vibration sensor (30) such as an accelerometer, velocity sensor or displacement sensor to pick up and faithfully transmit a talker's voice despite acoustically noisy ambient environments. The system senses the microphone signal amplitude and adjusts the gain of associated amplification circuitry (23, 26) to effectively and smoothly fade in the microphone signal and fade out the vibration sensor signal as ambient noise increases. The pickup system (10) may be part of a stand alone ear level communication transmitter worn behind the talker's ear, or it may be implemented in a telephone system or other communication systems.</p> |
