文档介绍：Schroeter, J., Mehta, ., Carter, . “Acoustic Signal Processing”
The Electrical Engineering Handbook
Ed. Richard C. Dorf
Boca Raton: CRC Press LLC, 2000
19
Acoustic Signal Processing
Juergen Schroeter
Digital Signal Processing in Audio and Electroacoustics
Acoustics Research Dept., AT&T Steerable Microphone Arrays•Digital Hearing Aids•Spatial
Bell Laboratories
Processing•Audio Coding•Echo Cancellation•Active Noise
Sanjay K. Mehta and Sound Control
NUWC Detachment Underwater Acoustical Signal Processings
What Is Underwater Acoustical Signal Processing?•Technical
G. Clifford Carter Overview•Underwater Propagation•Processing
NUWC Detachment Functions•Advanced Signal Processing•Application
Digital Signal Processing in Audio and Electroacoustics
Juergen Schroeter
In this section we will focus on advances in algorithms and technologies in digital signal processing (DSP) that
have already had or, most likely, will soon have, a major impact on audio and electroacoustics (A&E). Because
A&E embraces a wide range of topics, it is impossible for us to go here into any depth in any one of them.
Instead, this section will try to give pressed overview of the topics the author judges to be most important.
In the following, we will look into steerable microphone arrays, digital hearing aids, spatial processing, audio
coding, echo cancellation, and active noise and sound control. We will not cover basic techniques in digital
recording [Pohlmann, 1989] puter music [Moore, 1990].
Steerable Microphone Arrays
Steerable microphone arrays have controllable directional characteristics. One important application is in
teleconferencing. Here, sound pickup can be highly degraded by reverberation and room noise. One solution
to this problem is to utilize highly directional microphones. Instead of pointing such a microphone manually
to a desired talker, steerable microphone arrays can be used for reliable automatic tracking o