Results 211 to 220 of about 12,375 (270)

Comparison of microphone-array configurations for three- and four-microphone arrays

SPIE Proceedings, 1997
ABSTRACT This paper will address the benefits and drawbacks of different configurations of 3 and 4 microphone adaptive arrays. In particular, broadside and endfire configurations of equally spaced and logarithmically spaced arrays will becompared. The assessment will be done using arrays of simple electret microphones in actual acoustic environments ...
Michael W. Hoffman, X. F. Lu, C. Pinkelman, Z. Li   +3 more
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A pseudo adaptive microphone array

2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03)., 2003
A pseudo adaptive microphone array scheme is presented in this paper for high quality speech acquisition. This two-stage scheme consists of an initial enhanced cross-power spectrum phase (ECPSP) stage, which is used to estimate the directions of the target as well as the spatially distinguishable undesired signals, followed by an optimum spatial filter,
Jianfeng Chen, Louis Shue, Hanwu Sun
openaire   +1 more source

Noise cancelling for microphone arrays

1997 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2002
An application of the noise cancelling method for suppression of noise of a microphone array system is discussed. First an overview of the noise cancelling approach is given. This is followed by a description of the employment of the method in a realized microphone array system.
Jens Meyer, Carsten Sydow
openaire   +1 more source

The nearfield spherical microphone array

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
A nearfield spherical microphone array is presented. The nearfield criterion of the spherical array is defined in terms of array order, frequency and location. It is shown that given a source in the nearfield, significant attenuation of farfield interference is achieved.
Etan Fisher, Boaz Rafaely
openaire   +1 more source

Dynamically reconfigurable microphone arrays

2011 IEEE International Conference on Robotics and Automation, 2011
Robotic sound localization has traditionally been restricted to either on-robot microphone arrays or embedded microphones in aware environments, each of which have limitations due to their static configurations. This work overcomes the static configuration problems by using visual localization to track multiple wireless microphones in the environment ...
Eric Martinson, Benjamin R. Fransen
openaire   +1 more source

The Spherical-Shell Microphone Array

IEEE Transactions on Audio, Speech, and Language Processing, 2008
Spherical microphone arrays have been recently studied for a wide range of applications. In particular, microphones arranged around an open or virtual sphere are useful in scanning microphone arrays for sound field analysis. However, open-sphere spherical arrays have been shown to have poor robustness at frequencies related to the zeros of the ...
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Steerable Circular Differential Microphone Arrays

2018 26th European Signal Processing Conference (EUSIPCO), 2018
An efficient continuous beam steering method, applicable to differential microphones of any order, has been recently developed. Given two identical reference beams, pointing in two different directions, the method allows to derive a beam of nearly constant shape continuously steerable between those two directions.
Lovatello J., Bernardini A., Sarti A.
openaire   +1 more source

A microphone array for car environments

Speech Communication, 1992
Abstract This paper describes a microphone array for speech recording in car environments. The array is designed for hands-free radiotelephone, and is also used as a front-end for an automatic speech recognition system (this study has been realised within the european ESPRIT project ARS “adverse environment recognition of speech”). We first summarise
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Superdirective Microphone Arrays

2001
This chapter gives an overview of so-called superdirective beamformers, which can be derived by applying the minimum variance distortionless response (MVDR) principle to theoretically well-defined noise fields, as for example the diffuse noise field. We show that all relevant performance measures for beamformer designs are functions of the coherence ...
Joerg Bitzer, K. Uwe Simmer
openaire   +1 more source

Remote microphone virtual sensing with nested microphone sub-arrays [PDF]

The Journal of the Acoustical Society of America
This study uses the remote microphone technique to investigate the use of nested sub-arrays that incorporate either pressure or both pressure and pressure gradient information to estimate the pressure at remote locations in a random sound field. The sub-arrays of either pressure sensors or closely spaced microphone pairs are nested to form both uniform
Achilles Kappis, Jihui (Aimee) Zhang, Jordan Cheer   +2 more
openaire   +4 more sources