摘要
提出了双初级传声器加分频器的单次级声源的噪声有源控制新系统，从理论上分析了该系统对管道噪声有源控制的可能性．用该系统对单频声、多频声和某风井的宽频带噪声进行了消声试验，分别取得了２５～３０ｄＢ，１５．８ｄＢ和１１．３ｄＢ的降噪量。
A new active noise control system is presentend for monosecondary sound source of dualprimary microphone with a frequency divider. In order to verify whether it can be used for active noise control in ducts,theoretical analysis is carried out. Using the new control system, noise reduction experiments are conducted with different kinds of noise,such as singlefrequency noise,multifrequency noise and broadband noise of mine ventilatingshaft. As a result, the sound pressure level has been lowered down for 25￣30 dB, 15 dB, and 11.3 dB, respectively. Thus the experiments prove that the new control system presented in this paper is feasible and effective in active noise control in ducts.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
1999年第4期397-400,共4页
Journal of China University of Mining & Technology
基金
煤炭科学基金
关键词
管道
有源噪声控制
分频器
噪声
duct, active noise control, dualprimary microphone, frenquency divider, monosecondary source
