| 摘要 |
PROBLEM TO BE SOLVED: To provide a sound collector that can reduce the component cost and miniaturize a housing.SOLUTION: A microphone array 10 has an analog multiplexer 12 for switching audio signals output from microphone units M1 to Mn. Each of delay circuits D2 to Dn having delay amounts which are respectively displaced every period corresponding to one sampling clock is interposed between each of the microphone units M2 to Mn and the analog multiplexer 12. The analog multiplexer 12 successively switches and outputs audio signals to be input into the input terminals z1 to zn thereof in synchronism with the sampling clock from the AD converter 18. The AD converter 18 successively samples the thus-output audio signals and converts the audio signals to digital audio data, implementing simultaneous sampling of the respective audio signals output from the microphone units M1 to Mn.SELECTED DRAWING: Figure 4 |
