Title :
Experimental study of dual microphone systems
Author :
Chen, Jianfeng ; Shue, Louis ; Koksoon Phua ; Sun, Hunwu
Author_Institution :
Inst. for Infocomm Res., Singapore
Abstract :
In this paper, we compare and evaluate the various noise cancellation schemes available in what we term a dual microphone system. A dual microphone system (DMS) is a composite directional audio-capturing device which consists of two microphones, each microphone having possibly different directional characteristics, e.g., omnidirectional, bidirectional or cardioid. By recasting the various combinations of two microphones for a DMS into a coherent and familiar framework of generalized sidelobe canceller (GSC), we subsequently derive the expected noise reduction of various structures under incoherent, coherent and diffuse noise fields, followed by a series of experiments in a typical office environment. These results are indicative of the achievable reduction of noise in real applications. The relationship and differences between the various methods are also discussed
Keywords :
acoustic signal processing; interference suppression; microphones; composite directional audio-capturing device; dual microphone systems; generalized sidelobe canceller; noise cancellation; noise reduction; office environment; Auditory system; Cardiology; Fuses; Microphones; Noise cancellation; Noise reduction; Oral communication; Signal to noise ratio; Sun; Working environment noise;
Conference_Titel :
Multimedia and Expo, 2004. ICME '04. 2004 IEEE International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-8603-5
DOI :
10.1109/ICME.2004.1394535