A study of cost functions for the Virtual Sound Barrier system

作者：Zou Haishan^*; Qiu Xiaojun; Lu Jing

来源：38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009, 2009-08-23 to 2009-08-26.

• Acoustic energy
• Acoustic potential energy
• Control performance
• Error sensors
• Kinetic energy density
• Quiet zone
• Total energy
• Virtual sound barrier

A comparison of three cost functions is undertaken for Virtual Sound Barrier (VSB) system. The cost functions to be minimized include the sum of acoustic potential energy density, the sum of acoustic kinetic energy density and the sum of the total acoustic energy density at the error sensors. Numerical simulations are carried out in three-dimensional sound fields, which show that good control performance can be achieved by minimizing the sum of acoustic potential energy density, but the noise reduction distribution is not uniform in the quiet zone. By minimizing the sum of acoustic kinetic energy density, noise reduction distribution is uniform but with poor control performance. It seems that minimizing the sum of total energy density is the best strategy which achieves both good control performance as well as uniform noise reduction distribution.

• 出版日期2009
• 单位南京大学