Results 291 to 300 of about 46,475 (334)

Predicting reverberation times in a simulated classroom

The Journal of the Acoustical Society of America, 2000
By varying the sound-absorption treatments in a simulated classroom, experimental results were compared with analytical and computer predictions of reverberation time. Analytical predictions were made with different absorption exponents, which are the result of different weighting procedures involving room surface areas and the sound-absorption ...
Bistafa, S. R., Bradley, J. S.
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Optimum Reverberation Time for Auditoriums

The Journal of the Acoustical Society of America, 1930
Up to the present, the acoustics of auditoriums has rested on a purely empirical basis. A more satisfactory situation would be reached if we knew a physical quantity which had some definite value for all rooms, regardless of size, which are considered acoustically good.
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Reverberation time series generation

2009 International Symposium on Ocean Electronics (SYMPOL 2009), 2009
This paper deals with the generation of non-stationary reverberation time series using a reverberation spectrum model. The expected spectra are predicted using a numerical implementation (referred to as the reverberation spectrum model), of a general formulation of Faure, Ol'shevskii, and Middleton as a function of relevant sonar system parameters and ...
R. Pradeepa, Priyanka Saini, V Aparna, V. P. Felix   +3 more
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Time reversal of interface reverberation

The Journal of the Acoustical Society of America, 2004
Bottom reverberation can be used as a probe-source of opportunity to construct a time-reversal focus that scans along a rough interface. We present results from a tank experiment at ultrasonic frequencies in which reverberation from a sandy bottom was collected on a 64-element source/receiver array.
Joseph F. Lingevitch, Philippe Roux
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Measurement of Reverberation Time

American Journal of Physics, 1965
A simple experiment to measure the reverberation time of a room is described. The relevant theory is outlined, and typical results are given. The experiment is designed for inclusion in a course of practical work for first-year university students in physics.
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Reverberation Time Measurements in Reverberant Spaces

2008
The goal of this paper is to examine the reverberation time measurements made in small and large reverberant spaces using different measurement methods, namely, the integrated impulse response measured with pink noise, exponential sweep and MLS and the method of recording the response of the room to an impulsive source, e.g.
Jambrošić, Kristian, Domitrović, Hrvoje, Horvat, Marko   +2 more
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‘Reverberation Time’, dreaming and the capacity to dream [PDF]

The International Journal of Psychoanalysis, 2009
In this paper the author suggests that understanding the roots of the subjective sense of time can throw light on the disturbances in psychic time which are found in particular in the more severe pathologies. She introduces the argument that the roots of the development of the sense of time rest on a primitive sense of time she calls 'reverberation ...
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Reverberation time prediction software

Applied Acoustics, 1988
Abstract Reverberation time prediction in room acoustics is a subject suitable for the development of a microcomputer software application. Based on two data-bases—one for the actual predictions and one for the building and acoustical materials needed to control the acoustical conditions of a room—such an application, using a conversational ...
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Reverberation time of the Rotunda of Thessaloniki

The Journal of the Acoustical Society of America, 1975
The Rotunda of Thessaloniki is a unique 4th century monument of romanesque art, with an octagonal floor plan and a volume of 15 645 n3. Today it is used as a hall for orchestral and choral presentations. The reverberation time of the Rotunda has been measured on three different occasions, and the obtained data, together with the listeners absorption ...
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Holographic measurement of reverberation time

Applied Acoustics, 1979
Abstract A system employing the radio frequency holographic method for the measurement of the reverberation time of an acoustic chamber is proposed. This system has the advantage of supplying visible information on the diminishing intensity of the acoustic wave.
K.D. Dikshit, H.K. Dikshit
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