| 摘要 |
<p>PROBLEM TO BE SOLVED: To allow for accurate evaluation of a work even when a voice from the work is Doppler shifted.SOLUTION: A test piece 2 conveyed by a conveyance apparatus 3 outputs a voice from a speaker 11 on the basis of a first inspection sound source 15. A voice output inspection device 1 collects a voice outputted from the test piece 2 as a first waveform signal, and evaluates the voice by processing arithmetically in an operation unit 24. The voice output inspection device 1 has a second inspection sound source 26 including waveform data similar to that of the first inspection sound source 15, calculates the Doppler shift amount of two signals by comparing the second waveform signal of the second inspection sound source 26 and the first waveform signal collected by a microphone 21, and then corrects the Doppler shift of the first waveform signal. The speaker 11 of the test piece 2 is evaluated by examining the cross-correlation of the first waveform signal and second waveform signal after correction.</p> |
