| 摘要 |
<p>A Doppler ultrasonic pickup analyzing and processing method and device, the method comprising the following steps: transmitting an ultrasonic wave signal of a fixed frequency to a sound producing target such as human tissue or a resonance part both comprising vocal cords and vibrating with the vocal cords, and a non-living sound producing object, and receiving a reflected echo signal of the ultrasonic wave signal returned from the sound producing target (S101); amplifying the reflected echo signal, and comparing the amplified signal with the ultrasonic wave signal or a reference ultrasonic wave signal to obtain a Doppler frequency shift signal comprising the sound production feature of the sound producing target (S102); and outputting the Doppler frequency shift signal as an audio signal or a visible spectrogram for a corresponding application, or as a light signal (S103). The method, based on the Doppler ultrasonic principle, transmits an ultrasonic wave signal to a sound producing target, receives an echo signal for analysis and processing, extracts a Doppler frequency shift signal comprising the sound production feature of the sound producing target, and outputs the Doppler frequency shift signal as an audio signal, a visible spectrogram, or a light signal, thus overcoming the defects of an ordinary microphone and a bone conduction microphone.</p> |
