Results 1 to 10 of about 23,194 (297)

Study on Doppler characteristics of underwater bistatic reverberation [PDF]

MATEC Web of Conferences, 2019
Active sonar has two typical types of geometry configuration respectively named monostatic and bistatic like a radar system. In the monostatic scenario, co-located underwater transducers transmit and receive sound energy, while in a bistatic situation ...
Wang Fangyong, Jiang Yeming, Du Shuanping   +2 more
doaj   +1 more source

Effects of noise and reverberation on speech perception and listening comprehension of children and adults in a classroom-like setting

Noise and Health, 2010
The effects of classroom noise and background speech on speech perception, measured by word-to-picture matching, and listening comprehension, measured by execution of oral instructions, were assessed in first- and third-grade children and adults in a ...
Maria Klatte, Thomas Lachmann, Markus Meis   +2 more
doaj   +1 more source

Chinese Syllable and Phoneme Identification in Noise and Reverberation

Archives of Acoustics, 2014
Chinese is a tonal language, which differentiates it from non-tonal languages in the Western countries. A Chinese character consists of an initial, a final, and a tone. In the present study, the effects of noise and reverberation on the Chinese syllable,
Jianxin PENG
doaj   +1 more source

A Revised Sound Energy Theory Based on a New Formula for the Reverberation Radius in Rooms with Non-Diffuse Sound Field

Archives of Acoustics, 2014
This paper discusses the concept of the reverberation radius, also known as critical distance, in rooms with non-uniformly distributed sound absorption.
Higini ARAU-PUCHADES, Umberto BERARDI
doaj   +1 more source

Model selection techniques for seafloor scattering statistics in synthetic aperture sonar images of complex seafloors

IET Radar, Sonar & Navigation
In quantitative analysis of seafloor scattering measurements, it is common to model the single‐point probability density function of the scattered intensity or amplitude.
Derek R. Olson, Marc Geilhufe
doaj   +1 more source

Fast reverberation-reduction algorithm based on inexact matrix decomposition [PDF]

JASA Express Letters
Traditionally, matrix-based methods for reverberation reduction have prioritized a high signal-to-reverberation ratio over low time consumption. This letter describes a fast reverberation-reduction algorithm.
Yunchao Zhu, Rui Duan, Kunde Yang, Qindong Sun   +3 more
doaj   +1 more source

Analysis of Bottom Reverberation Intensity Under Beam-Controlled Emission Conditions in Deep Water

Archives of Acoustics
A comprehensive understanding of the characteristics and the formation mechanism of reverberation is the key to improving the performance of the active target detection.
Guangying ZHENG, Xiaowei GUO, Fangwei ZHU, Fangyong WANG, Linlang BAI   +4 more
doaj   +1 more source

Noise immunity increase of sonar signals from the complex bodies identification and recognition against reverberation interferences

Известия высших учебных заведений России: Радиоэлектроника, 2015
Methods of identification and recognition of sonar signals reflected from the bodies with complex geometric shape have been developed and calibrated in hydroacoustic tank and at sea.
V. S. Davidov
doaj  

Prediction of the reverberation time in rectangular rooms with non-uniformly distributed sound absorption

Archives of Acoustics, 2001
The aim of this paper is first to review the best known reverberation time formulae and then to show that the reverberation time cannot be thereby predicted accurately in cases mostly encountered in practice, where the sound field is not ...
R. Neubauer, B. Kostek
doaj  

Reverberation time of Wrocław Opera House after restoration

Archives of Acoustics, 2014
One of the main acoustic goals set prior to restoration work on the Wrocław Opera House in 1997 was to increase the auditorium’s reverberation time. Now, after the completion of the restoration work, comprehensive acoustic investigations of the Opera ...
Krzysztof Rudno-Rudziński, P. Dziechciński   +1 more
doaj