Results 41 to 50 of about 7,499 (273)

Performance Analysis of MVDR Beamformer Applied on an End-fire Microphone Array Composed of Unidirectional Microphones

open access: yesArchives of Acoustics, 2021
Microphone array with minimum variance (MVDR) beamformer is a commonly used method for ambient noise suppression. Unfortunately, the performance of the MVDR beamformer is poor in a real reverberant room due to multipath wave propagation. To overcome this
Zoran ŠARIĆ   +4 more
doaj   +1 more source

A Binaural System For The Suppression Of Late Reverberation

open access: yes, 1998
Publication in the conference proceedings of EUSIPCO, Rhodes, Greece ...
P. N. Denbigh, K. Lebart, J. M. Boucher
openaire   +2 more sources

UV–Optical Disk Reverberation Lags despite a Faint X-Ray Corona in the Active Galactic Nucleus Mrk 335

open access: yesThe Astrophysical Journal, 2023
 We present the first results from a 100-day Swift, NICER, and ground-based X-ray–UV–optical reverberation mapping campaign of the Narrow-line Seyfert 1 Mrk 335, when it was in an unprecedented low X-ray flux state.
Erin Kara   +39 more
doaj   +1 more source

Speech improvement in noisy reverberant environments using virtual microphones along with proposed array geometry

open access: yesEURASIP Journal on Advances in Signal Processing, 2022
This paper proposes a novel approach for improving the speech of a single speaker in noisy reverberant environments. The proposed approach is based on using a beamformer with a large number of virtual microphones with the suggested arrangement on an open
Mohammad Ebrahim Sadeghi   +2 more
doaj   +1 more source

Efficient Approach for OS-CFAR 2D Technique Using Distributive Histograms and Breakdown Point Optimal Concept applied to Acoustic Images [PDF]

open access: yes, 2019
In this work, a new approach to improve the algorithmic efficiency of the Order Statistic-Constant False Alarm Rate (OS-CFAR) applied in two dimensions (2D) is presented.
Acosta, Gerardo Gabriel   +3 more
core   +2 more sources

Channel and temporal-frequency attention UNet for monaural speech enhancement

open access: yesEURASIP Journal on Audio, Speech, and Music Processing, 2023
The presence of noise and reverberation significantly impedes speech clarity and intelligibility. To mitigate these effects, numerous deep learning-based network models have been proposed for speech enhancement tasks aimed at improving speech quality. In
Shiyun Xu, Zehua Zhang, Mingjiang Wang
doaj   +1 more source

Self-shadowing Effects of Slim Accretion Disks in Active Galactic Nuclei: Diverse Appearance of the Broad-line Region

open access: yes, 2014
Supermassive black holes in active galactic nuclei (AGNs) undergo a wide range of accretion rates, which lead to diversity of appearance. We consider the effects of anisotropic radiation from accretion disks on the broad-line region (BLR), from the ...
Du, P., Ho, L. C., Qiu, J., Wang, J. -M.
core   +1 more source

A Low-Cost Robust Distributed Linearly Constrained Beamformer for Wireless Acoustic Sensor Networks with Arbitrary Topology

open access: yes, 2018
We propose a new robust distributed linearly constrained beamformer which utilizes a set of linear equality constraints to reduce the cross power spectral density matrix to a block-diagonal form.
Hendriks, Richard C.   +3 more
core   +1 more source

The intermediate line region in active galactic nuclei [PDF]

open access: yes, 2016
We show that the recently observed suppression of the gap between the broad line region (BLR) and the narrow line region (NLR) in some AGN can be fully explained by an increase of the gas density in the emitting region.
Adhikari, T. P.   +4 more
core   +3 more sources

Lightweight Model for Fish Recognition Based on YOLOV5-MobilenetV3 and Sonar Images

open access: yesGuangdong nongye kexue, 2023
【Objective】Cage biometrics and statistics are one of the key reference factors for marine pasture farming management. Aiming at the interference of reverberation noise and complex background, this paper constructs fish detection data sets under different
Yizhi LUO   +6 more
doaj   +1 more source

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