Results 221 to 230 of about 1,518,880 (291)

On Spatial Aliasing in Microphone Arrays

IEEE Transactions on Signal Processing, 2009
Microphone arrays sample the sound field in both space and time with the major objective being the extraction of the signal propagating from a desired direction-of-arrival (DOA). In order to reconstruct a spatial sinusoid from a set of discrete samples, the spatial sampling must occur at a rate greater than a half of the wavelength of the sinusoid ...
Jacek Dmochowski, Jacob Benesty, Sofiène Affes   +2 more
openaire   +1 more source

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
openaire   +1 more source

Your Microphone Array Retains Your Identity: A Robust Voice Liveness Detection System for Smart Speakers

USENIX Security Symposium
Though playing an essential role in smart home systems, smart speakers are vulnerable to voice spoofing attacks. Passive liveness detection, which utilizes only the collected audio rather than the deployed sensors to distinguish between live-human and ...
Yan Meng, Jiachun Li, Matthew Pillari, A. Deopujari, Liam D. Brennan, Hafsah Shamsie, Haojin Zhu, Yuan Tian   +7 more
semanticscholar   +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

Advances in Microphone Array Processing and Multichannel Speech Enhancement

IEEE International Conference on Acoustics, Speech, and Signal Processing
This paper reviews pioneering works in microphone array processing and multichannel speech enhancement, highlighting historical achievements, technological evolution, commercialization aspects, and key challenges.
Gongping Huang, J. R. Jensen, Jingdong Chen, Jacob Benesty, M. Christensen, A. Sugiyama, G. Elko, T. Gaensler   +7 more
semanticscholar   +1 more source

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

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

Continuous Health Monitoring With Resonant-Microphone-Array-Based Wearable Stethoscope

IEEE Sensors Journal, 2019
This paper reports the implementation and evaluation of an array-based recognition system for the detection of wheezing in breathing. We describe the design and fabrication of a resonant microphone array for pre-filtered acoustic signal acquisition, and ...
A. Shkel, E. S. Kim
semanticscholar   +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 ...
openaire   +1 more source