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Active control of outgoing noise fields in rooms
- Source :
- The Journal of the Acoustical Society of America. 144(3)
- Publication Year :
- 2018
-
Abstract
- Current active noise control systems can cancel noises in a duct effectively. However, they are insufficient for suppressing complex noise fields in time-varying rooms. This paper develops an active noise control system that can cancel tonal noise fields produced by a primary source in a room. The problem of tonal noise field control is formulated as estimating and canceling the outgoing field on a sphere surrounding the primary source. The proposed system limits the energy of the primary source radiating out of the sphere, thereby creating a global quiet zone inside the room. In addition, it removes the need for online secondary path estimation with reduced influence on desired sound fields in the room. A method for estimating the outgoing field on a sphere is presented, together with a wave-domain algorithm for controlling the outgoing field. Simulations and hardware demonstrations show the proposed system can reduce tonal noise fields in a room and over a wide frequency range.
- Subjects :
- Imagination
Acoustics and Ultrasonics
Computer science
Acoustics
media_common.quotation_subject
Active control
01 natural sciences
030507 speech-language pathology & audiology
03 medical and health sciences
Noise
Architectural acoustics
Arts and Humanities (miscellaneous)
0103 physical sciences
Duct (flow)
0305 other medical science
Tonal noise
010301 acoustics
Quiet zone
Active noise control
media_common
Subjects
Details
- ISSN :
- 15208524
- Volume :
- 144
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- The Journal of the Acoustical Society of America
- Accession number :
- edsair.doi.dedup.....82cab622ba145c5c8713b6aa1e5bdabc