Results 261 to 270 of about 1,827,815 (335)
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Technology and Culture, 2021
:This article investigates the role the Church of Jesus Christ of Latter-day Saints (LDS) played in shaping modern architectural acoustics and, in turn, how architectural acoustics shape bodies and gender.
A. Beardsley
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:This article investigates the role the Church of Jesus Christ of Latter-day Saints (LDS) played in shaping modern architectural acoustics and, in turn, how architectural acoustics shape bodies and gender.
A. Beardsley
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Subwavelength acoustic metamaterial with tunable acoustic absorption
The Journal of the Acoustical Society of America, 2015We present numerical simulations and experimental measurements for ultrasonic transmission through a subwavelength metamaterial consisting of an array of hollow cylinders embedded in a soft elastic matrix. The mechanical properties of the matrix, the lattice constant, and the size of the cylinders are optimized in order to maximize sound absorption in ...
Nicolas Viard +3 more
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Building and Environment, 2018
This study investigated changes in the reverberation time at concert hall seats due to the sound absorption of orchestra musicians. Different percentages of musician-occupied areas and densities of the musicians were analyzed on the stages of two 1:10 ...
J. Jeon, H. Jang, H. Jo
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This study investigated changes in the reverberation time at concert hall seats due to the sound absorption of orchestra musicians. Different percentages of musician-occupied areas and densities of the musicians were analyzed on the stages of two 1:10 ...
J. Jeon, H. Jang, H. Jo
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Acoustic absorptivity of direct acoustic rate feedback control
The Journal of the Acoustical Society of America, 1995The fixed-gain feedback methods often provide the only means of limiting transient noise and excessive sound pressures due to unmeasurable, incoherent disturbances. The use of direct acoustic rate feedback (DARFB) to control an enclosure’s reverberant energy has the benefit over other feedback methods of larger stability margins and improved stability ...
Daniel G. Cole, William R. Saunders
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On acoustic absorption in tissue.
The Journal of the Acoustical Society of America, 2011This work extends the relaxation theory of sound absorption to the case of continuous distribution of relaxation times. Such an extension is needed when the absorption mechanisms are not confined to viscosity and heat conduction, but are due mainly to the excitation of a large number of internal molecular degrees of freedom.
Gregory Vilensky +2 more
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Acoustical Absorption of Porous Pavement
Transportation Research Record: Journal of the Transportation Research Board, 2008Acoustical absorption coefficients of more than 140 pavement cores were obtained by the impedance tube method with two microphones and cross-spectral analyses. The effectiveness of the impedance tube in predicting noise reduction for different mixes was evaluated by comparing the correlations between onboard sound intensity levels and absorption ...
James T. Nelson +3 more
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Foam acoustic absorption member
The Journal of the Acoustical Society of America, 1988A foam acoustic absorption member having a stabilizing layer with perforations and, in order to obtain a simple, stable structural shape of homogeneous resistance to flow, the stabilizing layer (2) is a wide-side wall of a hollow body (K) which wall is pressed, under thermal deformation, against the foam layer (1), the openings in said hollow body ...
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Sound absorption performance and mechanism of flexible PVA microperforated membrane
Applied Acoustics, 2022A flexible micro-perforated material was fabricated for acoustic application in this study, which is different from the traditional perforated material whose general impression is rigid, dense and inflexible.
Jiahui Shen, H. Lee, Xiong Yan
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Acoustic Impedance and Sound Absorption
The Journal of the Acoustical Society of America, 1940Theoretical curves for acoustic impedance vs. frequency, obtained by solving the equation for wave motion within the material, are compared with recently measured values of the impedance of various sound absorbing materials. The satisfactory agreement in most cases measured indicates that that for homogeneous materials the effective values of flow ...
Philip M. Morse +2 more
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Applied Acoustics, 2021
This research develops an underwater acoustic metamaterial, which can serve to absorb broadband low-frequency underwater sound under high hydrostatic pressure ranging from 200 to 2000 Hz.
Yinghong Gu +4 more
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This research develops an underwater acoustic metamaterial, which can serve to absorb broadband low-frequency underwater sound under high hydrostatic pressure ranging from 200 to 2000 Hz.
Yinghong Gu +4 more
semanticscholar +1 more source