| 摘要 |
<p>A sound collection device is applied to a sound signal delivery device including a speaker array having a plurality of speaker units arranged in a straight line and a microphone array having a plurality of microphone units arranged in a straight line. In a condensation arrangement section set symmetrically with respect to an arrangement origin corresponding to the center of the rectilinear arrangement, some of the microphone units are arranged at a predetermined equal interval. In a rarefaction arrangement section set outside the condensation arrangement section, the remaining microphone units are arranged in such a manner that the interval is gradually increased and the intervals are equal to the predetermined interval multiplied by an integer. This reduces the total number of the microphone units, reduces the production cost, and improves the sound collection directivity both in the high frequency band and the low frequency band.</p> |
