Results 21 to 30 of about 12,784,801 (349)

Study on Underwater Performance of Underwater Transducer Manufactured by 1-1-3 Piezoelectric Composite

open access: yesXibei Gongye Daxue Xuebao, 2019
A novel kind of underwater transducer with trapezoidal matching layer manufactured by 1-1-3 piezoelectric composite has been proposed to improve the underwater performance of high frequency transducer.

doaj   +1 more source

Review of Acoustic Sources Alternatives to a Dodecahedron Speaker

open access: yesApplied Sciences, 2019
An omnidirectional source is required in many acoustic measurements. Commonly a dodecahedron speaker is used but due to various factors (e.g., high cost, transportation difficulties) other acoustic sources are sometimes preferred. In this review, fifteen
Nikolaos M. Papadakis   +1 more
doaj   +1 more source

Low Cost Omnidirectional Sound Source Utilizing a Common Directional Loudspeaker for Impulse Response Measurements

open access: yesApplied Sciences, 2018
Alternative low-cost sources (e.g., balloons, gun fires) are used for impulse response measurements when a dodecahedron speaker is not available. This study sets to explore the applicability of a method utilizing a common directional loudspeaker as a ...
Nikolaos M. Papadakis   +1 more
doaj   +1 more source

Minimization of acoustic power in free space using multiple distributed sound sources (On the generation condition of the zero control power phenomena)

open access: yesNihon Kikai Gakkai ronbunshu, 2022
Low-frequency noise is difficult to suppress by passive control using a sound absorbing material. Active noise control is expected to be an effective method against low-frequency noise. Minimizing the total acoustic power emitted by a sound source causes
Yuta OGASAWARA   +2 more
doaj   +1 more source

Sound Source Localization Based on GCC-PHAT With Diffuseness Mask in Noisy and Reverberant Environments

open access: yesIEEE Access, 2020
Although sound source localization is a desirable technique in many communication systems and intelligence applications, the distortion caused by diffuse noise or reverberation makes the time delay estimation (TDE) between signals acquired by a pair of ...
Ran Lee   +5 more
semanticscholar   +1 more source

Sound Source Localization in Wide-Range Outdoor Environment Using Distributed Sensor Network

open access: yesIEEE Sensors Journal, 2020
Sound source localization has always been one of the most challenging subjects in different fields of engineering, one of the most important of which being tracking of flying objects.
M. Faraji   +3 more
semanticscholar   +1 more source

On Static Pressure Fluctuation between Sirocco Fan Blades in a Car Air-Conditioning System

open access: yesJournal of Fluid Science and Technology, 2008
In this study, special attention is directed to static pressure fluctuation in a sirocco fan for a car air-conditioning system, because it is expected that there is a close connection between the fluid noise and the pressure fluctuation.
Yasuhiko SAKAI   +7 more
doaj   +1 more source

Free-Field TDOA-AOA Sound Source Localization Using Three Soundfield Microphones

open access: yesIEEE Access, 2020
Accurate source localization is an important problem in many research areas as well as practical applications in wireless communications and acoustic signal processing.
L. Kraljević   +3 more
semanticscholar   +1 more source

Enhanced Robot Speech Recognition Using Biomimetic Binaural Sound Source Localization [PDF]

open access: yesIEEE Transactions on Neural Networks and Learning Systems, 2019
Inspired by the behavior of humans talking in noisy environments, we propose an embodied embedded cognition approach to improve automatic speech recognition (ASR) systems for robots in challenging environments, such as with ego noise, using binaural ...
Jorge Dávila-Chacón   +2 more
semanticscholar   +1 more source

The metaphorical potential of onomatopoeia in German media discourse [PDF]

open access: yesАктуальные проблемы филологии и педагогической лингвистики
This paper is devoted to the study of the metaphorical potential of vocabulary with the semantics of sound in modern German, namely, the specifics of creating implicit meanings in the syntactic constructions of texts of mass media discourse with ...
Nataliya N. Evtugova
doaj   +1 more source

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