| 摘要 |
<p>A sound pickup apparatus (10) includes: a microphone array (20) including at least three microphones (11-13), whit a first pair of microphones (11, 12) aligned on a first axis (X), and a second pair of microphones (12, 13) aligned on a second axis (Y); a first null signal generator (21) which outputs a first null signal based on a differential output of the first pair of microphones (11, 12); a second null signal generator (22) which outputs a second null signal based on a differential output of the second pair of microphones (12, 13); and a combiner (409) which generates a target signal based on the first null signal and the second null signal, the target signal having a directional characteristic in which the lowest sensitivity is formed in a direction to a line along which the first null surface meets the second null surface.</p> |
