中原大學電機工程學系
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105學年度
卡拉OK麥克風回音消除 Echo Cancelling of Karaoke Microphone
指導老師:張政元   組長:莊佳增   組員:李亞展
現今市面上的卡拉OK麥克風,多半都是以限制揚聲器輸出的音量上限,來避免麥克風收到揚聲器傳出的回音後,而造成回授效應(Feedback)。若麥克風跟喇叭之間形成了回授路徑,就會產生極大的噪音,如此一來就無法盡興的歡唱卡拉OK。
本研究是透過在卡拉ok麥克風上加裝微控制器,且透過適應性演算法,將揚聲器傳來的聲音去除並保留麥克風的原輸入,再混合音樂使輸出的聲音僅有音樂及演唱者的聲音,而非上一階段的回音,如此一來就能夠解決產生回音的問題,避免受到極大噪音干擾。
Nowadays, the karaoke microphones on the market mostly limited the loudspeaker to output volume, avoiding receiving the echo to cause feedback. If between the microphone and the loudspeaker formed the feedback path, it will arise great noise. As a result, people cannot be enjoyed singing.
Based on adaptive algorithm, this research came to remove the voice of loudspeaker and retain the original microphone input through the installation of the microcontroller karaoke microphone. Then, it mix the music, output music and singer’s voice only. Instead of the echo of the previous stage, so that you can solve the problem of echo and avoid the noise interference.
我們決定將壓電陶瓷晶片和鞋子做結合。
 
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