| 摘要 |
An audio signal processing apparatus includes first, second and third omni-directional microphones (101,102,103) which are spaced apart by a predetermined distance, a first adder section (110) to generate an audio signal having an omni-directivity in the whole circumferential direction, a first subtractor section (115) to generate an audio signal having a directivity in the right-left direction, a second adder section (111) that adds audio signals generated by the first and third omni-directional microphones (101,103), a second subtractor section (120) to generate an audio signal having a directivity in the front-back direction, and an output section (130) that adds the audio signal resulting from the multiplication of the audio signal having a directivity in the whole circumferential direction by a predetermined coefficient, the audio signal resulting from the multiplication of the audio signal having a directivity in the right-left direction by a predetermined coefficient, and the audio signal resulting from the multiplication of the audio signal having a directivity in the front-back direction by a predetermined coefficient and generates a unidirectional audio signal.
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