| Publisher | Microsoft | ||
|---|---|---|---|
| Format | 198.2KB PDF | Date added | 30 Jun 2005 |
| Topics | Sound Components, Software Engineering | ||
| Downloads | 101 | ||
This paper presents a hybrid microphone array architecture used for processing the signals from a small microphone array that is used in a headset. The processing chain consists of fixed end-fire beamforming, adaptive spatial noise reduction and stationary noise suppression. The far-field design algorithm used for the fixed beamformer is adapted to the specifics of the headset by compensating for the directivity of the mouth and the sound diffraction around the head. The spatial noise reduction generalizes the suppression rule for optimal MMSE power noise reduction to multiple dimensions. The algorithm was tested with a headset that used a three element microphone array. It is computationally effective and provides up to 18 dB of ambient noise suppression.
Did you find this white paper useful?
25 out of 50 users found this white paper useful
Related white papers
Sound Systems on Linux: From the Past to the Future
The development of audio and sound support on the Linux system has a long history. It has been implemented since the early version of Linux system. In general, there are...
High Resolution Simulation of Acoustic Environments
This paper presents an overview of the important issues that need to be addressed in a high quality audio simulation system for use in Virtual Reality. Some aspects of room...
XAP™ 800 Audio Conferencing System
Gentner’s new XAP™ 800 takes the revolutionary AP800 to the next level of functionality and becomes the new standard of audio conferencing performance.The XAP 800 features Gentner’s proprietary Distributed Echo...
Loudspeakers and Time Coherence: What You Don't Know Can Hurt You
The specifications commonly used to describe speakers dwell almost entirely upon frequency and amplitude while revealing nothing at all about time domain fidelity. For good reasons, most manufacturers of speakers...
3-D Audio Primer
This document presents an introduction to the general concepts and performance of three-dimensional audio technology. Several audio technology categories are defined with the purpose of creating a common understanding of...
A Direct Box Can be in-DI-spensible
Direct boxes are often referred to as “DI” boxes. This stands for “Direct Injection” as their main purpose is to convert unbalanced and/or high impedance instrument signals into a format...
AD1890 and AD1891 SamplePorts Background [AD1890, AD1891]
The digital audio revolution will be complete when home sound systems utilize fully digital interconnect, with the final D/A conversion occurring at the power amplifier or the "digital speaker." Consumers...
