| 摘要 |
<p>An acoustic effect impartment apparatus (100) detects striking of any one of strings (5) by a corresponding hammer (4) in an acoustic piano like a grand piano (1), and vibrates a vibration section (50) with a driving waveform signal obtained by synthesizing sine wave signals of the fundamental frequency and harmonic frequency of the hammer-struck string. Such vibration of the vibration section is transmitted to the keys via a soundboard (7) and bridge (6) of the piano. Thus, vibration is excited in the hammer-struck string (5) by the striking with the hammer (4) but also by the driving waveform signal, so that an acoustic effect corresponding to the driving waveform signal is imparted. Because the driving waveform signal is a simple signal using the sine wave signals corresponding to the fundamental frequency of the string, a natural feeling of the acoustic piano will not be lost even when the acoustic effect is imparted.</p> |
