Microphone arrays have attracted a lot of interest over the last
few decades since they have the potential to solve many important
problems such as noise reduction/speech enhancement, source
separation, dereverberation, spatial sound recording, and source
localization/tracking, to name a few. However, the design and
implementation of microphone arrays with beamforming algorithms is
not a trivial task when it comes to processing broadband signals
such as speech. Indeed, in most sensor arrangements, the beamformer
output tends to have a frequency-dependent response. One exception,
perhaps, is the family of differential microphone arrays (DMAs) who
have the promise to form frequency-independent responses. Moreover,
they have the potential to attain high directional gains with small
and compact apertures. As a result, this type of microphone arrays
has drawn much research and development attention recently. This
book is intended to provide a systematic study of DMAs from a
signal processing perspective. The primary objective is to develop
a rigorous but yet simple theory
for the design, implementation, and performance analysis of
DMAs. The theory includes some signal processing techniques for the
design of commonly used first-order, second-order, third-order, and
also the general "N"th-order DMAs. For each order, particular
examples are given on how to form standard directional patterns
such as the dipole, cardioid, supercardioid, hypercardioid,
subcardioid, and quadrupole. The study demonstrates the performance
of the different order DMAs in terms of beampattern, directivity
factor, white noise gain, and gain for point sources. The inherent
relationship between differential processing and adaptive
beamforming is discussed, which provides a better understanding of
DMAs and why they can achieve high directional gain. Finally, we
show how to design DMAs that can be robust against white noise
amplification.
General
Is the information for this product incomplete, wrong or inappropriate?
Let us know about it.
Does this product have an incorrect or missing image?
Send us a new image.
Is this product missing categories?
Add more categories.
Review This Product
No reviews yet - be the first to create one!