Performance Study of a Compact 2-Sensor Noise Cancelling System
In this paper, we propose a compact directional noise-cancelling device which consists of a differential microphone formed by two omni-directional microphones connected in an endfire orientation. By making use of adaptive beamforming for improved directionality, and echo shaping, a form of nonlinear speech enhancement, the proposed device is positioned to tackle noise found in real environments, which is typically a mixture of directional, stationary and non-stationary interferences. Performance evaluation of our real-time implementation is based on the following criteria: 1) directionality, 2) distortions, and 3) speech quality as measured by the Mean-Opinion-Score (MOS), through subjective listening tests and using the ITU-T P.862 Perceptual Evaluation of Speech Quality tool. Our experimental results indicate an average interference suppression of as much as 22dB, and consistent improvement in speech quality.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members, $5 for AES members and is free for E-Library subscribers.