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Parametric array loudspeaker

WebParametric array had been one of the most popular research area in underwater acoustics for decades since Westervelt published his famous paper in 1963[1], and parametric array signal processing is still an active research area so far [2][3][4]. Parametric acoustic source is the most important source for high-resolution sub-bottom profiler,

Reflection of audio sounds generated by a parametric …

WebDec 22, 2014 · The parametric array loudspeaker (PAL) is an application of the parametric acoustic array in air [ 1 ]. It was discovered by Westervelt in the early 1960s that two … WebSep 27, 2024 · Abstract: In this paper, the audio sound field generated by a focusing parametric array loudspeaker (PAL) is investigated both numerically and experimentally. A computationally efficient method is developed to calculate the quasilinear solution of both the Westervelt and Kuznetsov equations. has stephen boss died https://pineleric.com

Low Frequency Audio Sound Field Generated by a Focusing Parametric …

WebIn this paper, the audio sound field generated by a focusing parametric array loudspeaker (PAL) is investigated both numerically and experimentally. A computationally efficient … WebSep 4, 2005 · This paper presents a method of steering audible sound beams generated by parametric arrays in air. A hybrid system consisting of combined electronical / mechanical phased array technique is... A parametric array, in the field of acoustics, is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the diffraction limit (a kind of spatial 'uncertainty principle') … See more Priority for discovery and explanation of the parametric array owes to Peter J. Westervelt, winner of the Lord Rayleigh Medal (currently Professor Emeritus at Brown University), although important experimental work … See more • H.C. Woodsum and P.J. Westervelt, "A General Theory for the Scattering of Sound by Sound", Journal of Sound and Vibration (1981), 76(2), 179-186. See more The foundation for Westervelt's theory of sound generation and scattering in nonlinear acoustic media owes to an application of Lighthill's equation for fluid particle motion. See more Practical applications are numerous and include: • underwater sound • medical ultrasound See more boon \\u0026 heyninck bv

A Critical Step to Using a Parametric Array Loudspeaker in Mobile ...

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Parametric array loudspeaker

Multi-Beam Design Method for a Steerable Parametric …

WebJun 9, 2010 · To cope with this problem, this paper introduces a parametric array loudspeaker (PAL) which produces a spatially focused sound beam due to the attribute of … WebJan 15, 2024 · The parametric array loudspeaker (PAL) can realize sharp directivity utilizing the straightness of ultrasound, but it suffers from low sound quality due to the frequency-dependent response and harmonic distortions.The reproduces sound by PAL has a low sound pressure because it is generated among nonlinear actions in the air.

Parametric array loudspeaker

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WebIn this paper, the audio sound field generated by a focusing parametric array loudspeaker (PAL) is investigated both numerically and experimentally. A computationally efficient method is developed to calculate the quasilinear solution of both the Westervelt and Kuznetsov equations. The accuracy of generated sound field using Westervelt equation ... WebMay 17, 2024 · Abstract: The parametric array loudspeaker (PAL) modulates the audio signal on an ultrasonic carrier. When the modulated signal is transmitted in air, an audio beam is created based on the nonlinear acoustic principle. Each modulation method has advantages and disadvantages.

WebJun 8, 2024 · A Multibeam Steerable Parametric Array Loudspeaker for Distinct Audio Content Directing Abstract: The parametric acoustic effect has gained much interest in … WebDec 1, 2024 · Parametric array speakers produce highly directional/localised audible sound via the intermodulation of two ultrasonic waves. This concept appears in a few niche or novelty applications, including research I'm involved with, but I don't see much mention of it in terms of general music listening applications.

WebJan 15, 2024 · The parametric array loudspeaker (PAL) can realize sharp directivity utilizing the straightness of ultrasound, but it suffers from low sound quality due to the frequency-dependent response and harmonic distortions. The reproduces sound by PAL has a low sound pressure because it is generated among nonlinear actions in the air. Therefore, we … WebMar 5, 2024 · However, the audio sound field generated by a parametric array loudspeaker (PAL) is more complicated, and in this article it is proposed to be divided into three regions: near field, Westervelt far field, and inverse-law far field.

WebJul 5, 2009 · The speaker array actually produces a modulated wave made of two separate ultrasound waves. One of them is a steady, reference …

WebOct 14, 2024 · A Critical Step to Using a Parametric Array Loudspeaker in Mobile Devices Authors Hongmin Ahn 1 , Kyounghun Been 2 , In-Dong Kim 3 , Chong Hyun Lee 4 , Wonkyu Moon 5 Affiliations 1 Department of Mechanical Engineering, POSTECH, Pohang 37673, Korea. [email protected]. boonty the dogWebParametric speakers, also commonly referred to as directional speakers, are a unique variety of speakers which use ultrasonic waves to reproduce sound. The ultrasonic waves … boon \u0026 heyninck bvWebMar 1, 2024 · Parametric Array Loudspeaker is a directional sound technology that uses ultrasound amplitude modulation to generate audible sound in a specific propagation path. The mathematical modeling of this technology is an interesting problem that cannot be tackled analytically due to a nonlinear phenomenon associated with the production of … has stephen hawking always been disabledWebA parametric array loudspeaker (PAL) is an application of the parametric acoustic array for radiating highly direc-tional audio sounds in air.1,2 Existing analytical models of the PAL … has stephen curry retiredWebOct 14, 2024 · A parametric array (PA) loudspeaker is a highly directional audio source that might grant one's convenience if it is used with mobile devices. However, conventional PA … boon \\u0026 worth herefordWebMar 19, 2024 · Parametric loudspeakers can generate a highly directional beam of sound, having applications in targeted audio delivery. Audible sound modulated into an ultrasonic carrier will get self-demodulated along the highly directive beam due to the non-linearity of air. This non-linear demodularization should be compensated to reduce audio distortion, … boon \\u0026 up fabricWebMay 1, 2024 · A parametric array (PA) loudspeaker generates highly directional sound beams by exploiting the PA phenomenon. Before such loudspeakers were fabricated from … has stephen smith\\u0027s body been exhumed