On spatial spillover in feedforward and feedback noise control

详细信息    查看全文

• 作者：Antai Xie ; Dennis Bernstein ; ^{dsbaero@umich.edu}
• 关键词：Spatial spillover ; Feedback noise control ; Feedforward noise control ; Transmissibility
• 刊名：Journal of Sound and Vibration
• 出版年：2017
• 出版时间：17 March 2017
• 年：2017
• 卷：391
• 期：Complete
• 页码：1-19
• 全文大小：2932 K
• 卷排序：391

文摘

Active feedback noise control for rejecting broadband disturbances must contend with the Bode integral constraint, which implies that suppression over some frequency range gives rise to amplification over another range at the performance microphone. This is called spectral spillover. The present paper deals with spatial spillover, which refers to the amplification of noise at locations where no microphone is located. A spatial spillover function is defined, which is valid for both feedforward and feedback control with scalar and vector control inputs. This function is numerically analyzed and measured experimentally. Obstructions are introduced in the acoustic space to investigate their effect on spatial spillover.