Results 211 to 220 of about 26,557 (265)
Design of a broadband noise reduction barrier utilizing acoustic metamaterial with application to a substation. [PDF]
iScienceXu S +6 more
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From Noise Reduction to Positive Soundscapes: Enhancing Well-Being in Schools.
Noise HealthKurukose Cal H, Aletta F, Kang J.
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Acoustic analysis of trill sounds
The Journal of the Acoustical Society of America, 2012In this paper, the acoustic–phonetic characteristics of steady apical trills—trill sounds produced by the periodic vibration of the apex of the tongue—are studied. Signal processing methods, namely, zero-frequency filtering and zero-time liftering of speech signals, are used to analyze the excitation source and the resonance characteristics of the ...
N, Dhananjaya +2 more
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Sounds to Astound: An acoustics outreach show
The Journal of the Acoustical Society of America, 2022Sounds to Astound is an acoustics demonstration show, produced for the community twice yearly by the Brigham Young University Student Chapter of the Acoustical Society of America. The free, interactive demonstration show explores the science of sound for a target audience of fifth- to eighth-grade students.
Jennifer K. Whiting +6 more
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Refractive Acoustic Devices for Airborne Sound
Physical Review Letters, 2001It is shown that a system made of periodic distributions of rigid cylinders in air acts as a new material which allows the construction of refractive acoustic devices for airborne sound. This kind of crystal, named sonic crystal, has low impedance and transmits the sound at subsonic velocities. Here, the fabrication and characterization of a convergent
F, Cervera +8 more
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Acoustic transistor: Amplification and switch of sound by sound
Applied Physics Letters, 2014We designed an acoustic transistor to manipulate sound in a manner similar to the manipulation of electric current by its electrical counterpart. The acoustic transistor is a three-terminal device with the essential ability to use a small monochromatic acoustic signal to control a much larger output signal within a broad frequency range. The output and
Bin Liang +4 more
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SPIE Proceedings, 1999
For remote measurements of rains, radars have been successfully used for many years. In the last decade, high- frequency acoustic radars (sodars) are being increasingly employed to measure the parameters of precipitation. They have a number of advantages over the conventional radars.
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For remote measurements of rains, radars have been successfully used for many years. In the last decade, high- frequency acoustic radars (sodars) are being increasingly employed to measure the parameters of precipitation. They have a number of advantages over the conventional radars.
openaire +1 more source