| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve a problem that since a music studio is required to select a sound absorption material or minutely consider its layout for adjusting acoustic sound, a specific construction is required, thereby increasing a cost, while regarding a sound proof door also, an inconvenience occurs such as the door becoming heavy and difficult to open and close.SOLUTION: An active acoustic wave control system is constituted of a microphone 3, a controller 5 having a reverse phase conversion part for converting a sound wave collected by the microphone 3 into a reverse phase, a vibration application device 7 for outputting a sound wave converted into the reverse phase by the reverse phase conversion part as a vibration, and a vibration body 9 for outputting a vibration received from the vibration application device 7 as a sound wave. The superposition of the sound wave emitted from the vibration body 9 on a sound wave desired to be removed actively removes that sound wave. The vibration body 9, if constituted of a door (D), can replace the existing door by a sound proof door. In addition, if the door is configured to select a frequency and remove the sound wave of the frequency, the door can be utilized also for adjustment of the acoustic sound inside a chamber.</p> |
