1,721,339 research outputs found
Validation of the Pyramid Tracing algorithm for sound prediction outdoors: comparison with experimental measurements and with the ISO/DIS 9613 standards
No full textMeasurement of the surface scattering coefficient: comparison of the Mommertz/Vorlander approach with the new Wave Field Synthesis method
No full textIntroducing the surface diffusion and edge scattering in a pyramid-tracing numerical model for room acoustics
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Advancements in impulse response measurements by sine sweeps
No full textSine sweeps are employed since long time for audio and acoustics measurements, but in recent years (2000 and
later) their usage became much larger, thanks to the computational capabilities of modern computers. Recent
research results allow now for a further step in sine sweep measurements, particularly when dealing with the
problem of measuring impulse responses, distortion and when working with systems which are neither time
invariant, nor linear.
The paper presents some of these advancements, and provide experimental results aimed to quantify the
improvement in signal-to-noise ratio, the suppression of pre-ringing, and the techniques employable for performing
these measurements cheaply employing a standard PC and a good-quality sound interface, and currently available
loudspeakers and microphones
A New Method for Measuring the Scattering Coefficient and the Diffusion Coefficent of Panels
Full text linkThe sound scattering properties of diffusing panels are actually very difficult to measure
and to predict. In this paper the Wave Field Synthesis approach is employed for the
experimental measurement of the scattering coefficient. The results are in good agreement with
the numerical simulations made possible by some recent improvements to the Pyramid Tracing
algorithm, which takes into account separately the scattering of sound from the edges of finitesize
surfaces, and the surface scattering coefficient
Tecniche di convoluzione applicate al trattamento di segnali sonori per prove di ascolto
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