TY - GEN
T1 - Limits of noise control over space
AU - Abhayapala, Thushara D.
AU - Zhang, Jihui
AU - Samarasinghe, Prasanga
AU - Zhang, Wen
N1 - Publisher Copyright:
© 2019 Proceedings of the International Congress on Acoustics. All rights reserved.
PY - 2019
Y1 - 2019
N2 - This paper investigates the best possible performance of noise cancellation over a region of space for a fixed set of secondary sources within a given acoustic environment. We first formulate the spatial active noise control (ANC) problem in a 3-D acoustic enclosure (room). Secondly, we derive a wave-domain least square method by matching the secondary sound field to the primary noise field in wave domain. Thirdly, we propose a subspace method by matching the secondary field coefficients to the projection of primary noise field in the subspace. Simulation results compare between the wave-domain least square method and the subspace method, in terms of energy of the loudspeaker driving signals, noise reduction inside the region, and residual noise field outside the region. The subspace matching method provides the limits of the ANC system for the given constraints and the acoustic characteristics of the room.
AB - This paper investigates the best possible performance of noise cancellation over a region of space for a fixed set of secondary sources within a given acoustic environment. We first formulate the spatial active noise control (ANC) problem in a 3-D acoustic enclosure (room). Secondly, we derive a wave-domain least square method by matching the secondary sound field to the primary noise field in wave domain. Thirdly, we propose a subspace method by matching the secondary field coefficients to the projection of primary noise field in the subspace. Simulation results compare between the wave-domain least square method and the subspace method, in terms of energy of the loudspeaker driving signals, noise reduction inside the region, and residual noise field outside the region. The subspace matching method provides the limits of the ANC system for the given constraints and the acoustic characteristics of the room.
KW - Insulation
KW - Sound
KW - Transmission
UR - http://www.scopus.com/inward/record.url?scp=85099329516&partnerID=8YFLogxK
U2 - 10.18154/RWTH-CONV-239866
DO - 10.18154/RWTH-CONV-239866
M3 - 会议稿件
AN - SCOPUS:85099329516
T3 - Proceedings of the International Congress on Acoustics
SP - 47
EP - 54
BT - Proceedings of the 23rd International Congress on Acoustics
A2 - Ochmann, Martin
A2 - Michael, Vorlander
A2 - Fels, Janina
PB - International Commission for Acoustics (ICA)
T2 - 23rd International Congress on Acoustics: Integrating 4th EAA Euroregio, ICA 2019
Y2 - 9 September 2019 through 23 September 2019
ER -