| 摘要 |
<p>A system, which may be a fan unit (232), and method for controlling noise produced by an air handling system is provided. The system (232) includes a source microphone (270) to collect sound measurements from the air handling system and a processor to define a cancellation signal that at least partially cancels out the sound measurements. The system also includes a speaker (274) to generate the cancellation signal. The sound measurements are at least partially canceled out within a region of cancellation (268). Accordingly, the system further includes a response microphone (272) to collect response sound measurements at the region of cancellation (268). The processor tunes the cancellation signal based on the response sound measurements.</p> |
