ACTIVE DUCT NOISE CONTROL SYSTEM AND METHOD THEREOF

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

16/238,060

專利證號

US 10,720,142 B2

專利獲證名稱

ACTIVE DUCT NOISE CONTROL SYSTEM AND METHOD THEREOF

專利所屬機關 (申請機關)

國立清華大學

獲證日期

2020/07/21

技術說明

一種主動式管路噪音控制系統及其方法，其包含管路、噪音源喇叭、麥克風、複數個消噪喇叭以及複數個控制器。其中，噪音源喇叭產生主要噪音，麥克風是設置以接收殘餘噪音。複數個消噪喇叭是設置在噪音源喇叭與麥克風之間，且分別產生各自之消噪音頻以抵銷主要噪音。複數個控制器分別連接至複數個消噪喇叭及噪音源喇叭，藉由多通道反濾波器原理計算各個消噪喇叭所需產生之消噪音頻。與傳統方法相比，此技術有這更好的降噪效果。 An active duct noise control system and method thereof are disclosed. The system includes a duct, a source loud speaker, a microphone, a plurality of control loud speakers and a plurality of controllers. The source loud speaker generates the primary noise and the microphone is disposed to receive the residual noise. The plurality of control loud speakers are disposed between the source loud speaker and the microphone, so that the audio frequencies generated by the plurality of control loud speakers can be used to reduce the primary noise. The plurality of controllers are connected to the plurality of control loud speakers and the source loud speaker. The audio frequencies generated by the plurality of control loud speakers are controlled by the plurality of controllers according to the multichannel inverse filtering principle. In contrast with the conventional approaches, the technique achieves significantly higher noise reduction performance.

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