Results 171 to 180 of about 12,206 (226)
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Journal of Fluid Mechanics, 2002
A systematic study has been undertaken to quantify the effect of jet temperature on the noise radiated by subsonic jets. Nozzles of different diameters were tested to uncover the effects of Reynolds number. All the tests were carried out at Boeing's Low Speed Aeroacoustic Facility, with simultaneous measurement of thrust and noise. It is concluded that
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A systematic study has been undertaken to quantify the effect of jet temperature on the noise radiated by subsonic jets. Nozzles of different diameters were tested to uncover the effects of Reynolds number. All the tests were carried out at Boeing's Low Speed Aeroacoustic Facility, with simultaneous measurement of thrust and noise. It is concluded that
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A Primitive Approach to Aeroacoustics
2002A primitive approach to aeroacoustics is presented using the aeroacoustic analogies. This aproach is illustrated by a few examples like musical instruments, the Rijke tube, speech production etc.
Hirschberg, Avraham, Schram, C.
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Acoustics, Aeroacoustics and Vibrations
2016This didactic book presents the main elements of acoustics, aeroacoustics and vibrations.Illustrated with numerous concrete examples linked to solid and fluid continua, Acoustics, Aeroacoustics and Vibrations proposes a selection of applications encountered in the three fields, whether in room acoustics, transport, energy production systems or ...
Anselmet, Fabien, Mattei, Pierre-Olivier
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Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2004
Abstract The theory of the sibilant fricative [s] is formulated and solved as a mathematical problem of aeroacoustics. Air is forced through the constriction between the tongue blade and the hard palate by intra-oral pressure, forming a jet that strikes the upper incisors and leaves the mouth through a gap between the upper and lower ...
Michael S. Howe, Richard S. McGowan
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Abstract The theory of the sibilant fricative [s] is formulated and solved as a mathematical problem of aeroacoustics. Air is forced through the constriction between the tongue blade and the hard palate by intra-oral pressure, forming a jet that strikes the upper incisors and leaves the mouth through a gap between the upper and lower ...
Michael S. Howe, Richard S. McGowan
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An aeroacoustic approach to phonation
The Journal of the Acoustical Society of America, 1988A fluid mechanical, or aeroacoustic, point of view is followed to study possible sources of sound during phonation. Concentration is on two features of the vocal tract during phonation: abrupt area change from the glottis to the vocal tract and the finite length of the vocal tract.
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The Journal of the Acoustical Society of America, 2002
Several commercial options exist for prevention of the pseudo-sound often introduced by a microphone in the presence of a flow field. One such device is a so-called ‘‘slit-tube.’’ A slit-tube is a tube approximately the diameter of the microphone with which it is used.
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Several commercial options exist for prevention of the pseudo-sound often introduced by a microphone in the presence of a flow field. One such device is a so-called ‘‘slit-tube.’’ A slit-tube is a tube approximately the diameter of the microphone with which it is used.
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Proceedings of Meetings on Acoustics, 2013
The generic term “flute-like instruments” includes a wide variety of instruments whose sound production is ensured by the coupling of an air jet with an acoustic resonator. Within the family, different kinds of resonator (for instance Helmholtz resonator, open-open, or open-closed tube), may be used with different kind of air supply systems such as the
Auvray, Roman +4 more
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The generic term “flute-like instruments” includes a wide variety of instruments whose sound production is ensured by the coupling of an air jet with an acoustic resonator. Within the family, different kinds of resonator (for instance Helmholtz resonator, open-open, or open-closed tube), may be used with different kind of air supply systems such as the
Auvray, Roman +4 more
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AIAA Journal, 2005
Closed-Circuit wind tunnels in which air is driven by fans are widely used for aerodynamic testing. For aeroacoustic tests, in which the radiated sound field must be measured in the presence of flow, they have two major problems: the fan makes them noisy, and the hard walls make them reverberant.
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Closed-Circuit wind tunnels in which air is driven by fans are widely used for aerodynamic testing. For aeroacoustic tests, in which the radiated sound field must be measured in the presence of flow, they have two major problems: the fan makes them noisy, and the hard walls make them reverberant.
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2012
Computational aeroacoustics (CAA) is a relatively new research area. CAA algorithms have developed rapidly and the methods have been applied in many areas of aeroacoustics. The objective of CAA is not simply to develop computational methods but also to use these methods to solve practical aeroacoustics problems and to perform numerical simulation of ...
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Computational aeroacoustics (CAA) is a relatively new research area. CAA algorithms have developed rapidly and the methods have been applied in many areas of aeroacoustics. The objective of CAA is not simply to develop computational methods but also to use these methods to solve practical aeroacoustics problems and to perform numerical simulation of ...
openaire +2 more sources