ACTIVE CANCELLATION OF PRESSURE AT A POINT IN A PURE TONE DIFFRACTED DIFFUSE SOUND FIELD

✍ Scribed by J. Garcia-Bonito; S.J. Elliott; M. Bonilha

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 440 KB
• Volume: 201
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1996.0742

✦ Synopsis

In this paper the extension of the average zones of quiet produced in a diffuse acoustic field is studied when the acoustic pressure is cancelled at a point near a reflecting surface by using a remote secondary source. Analytical expressions for the extension of the zones of quiet generated when the cancellation point is close or on the surface of a rigid sphere, a wall, a two-wall edge and a corner have been derived. These theoretical results are compared with simulation results for the pressure in the vicinity of the cancellation point, and show good agreement.