Including directivity patterns in room acoustical measurements

2013 ◽  
Author(s):  
Martin Pollow ◽  
Johannes Klein ◽  
Pascal Dietrich ◽  
Michael Vorländer
Keyword(s):  
Directivity Patterns

Analysis of Spectral Characteristics of Sound Waves Scattered from a Cracked Cylindrical Elastic Shell Filled with a Viscous Fluid

2013 ◽  
Vol 38 (3) ◽  
pp. 335-350 ◽  
Author(s):  
Olexa Piddubniak ◽  
Nadia Piddubniak
Keyword(s):  
Viscous Fluid ◽  
Shell Theory ◽  
Elastic Shell ◽  
Spectral Characteristics ◽  
Steel Shell ◽  
Sound Waves ◽  
Thin Cylindrical Shell ◽  
Shell Surface ◽  
Theory Approximation ◽  
Directivity Patterns

Abstract The scattering of plane steady-state sound waves from a viscous fluid-filled thin cylindrical shell weak- ened by a long linear slit and submerged in an ideal fluid is studied. For the description of vibrations of elastic objects the Kirchhoff-Love shell-theory approximation is used. An exact solution of this problem is obtained in the form of series with cylindrical harmonics. The numerical analysis is carried out for a steel shell filled with oil and immersed in seawater. The modules and phases of the scattering amplitudes versus the dimensionless wavenumber of the incident sound wave as well as directivity patterns of the scattered field are investigated taking into consideration the orientation of the slit on the elastic shell surface. The plots obtained show a considerable influence of the slit and viscous fluid filler on the diffraction process.

Experimental studies of directivity patterns of laser generated ultrasound in neutral glasses

Ultrasonics ◽  
1995 ◽  
Vol 33 (6) ◽  
pp. 429-436 ◽  
Author(s):  
Bai Yuhai ◽  
Pei Liwei ◽  
Fang Qiping ◽  
Yan Yuping ◽  
Ying Chongfu
Keyword(s):  
Experimental Studies ◽  
Directivity Patterns

The effects of nonideal microphone directivity patterns on directional impulse response measurements.

2009 ◽  
Vol 126 (4) ◽  
pp. 2287
Author(s):  
J. James Esplin ◽  
Brian T. Thornock ◽  
Timothy W. Leishman
Keyword(s):  
Impulse Response ◽  
Directivity Patterns

Including directivity patterns in room acoustical measurements

2013 ◽  
Vol 133 (5) ◽  
pp. 3225-3225
Author(s):  
Martin Pollow ◽  
Johannes Klein ◽  
Pascal Dietrich ◽  
Michael Vorländer
Keyword(s):  
Directivity Patterns

Far-field Directivity Patterns For (YZw)36° Lithium Niobate Bars.

1993 ◽  
pp. 415-418
Author(s):  
Jamal ASSAAD ◽  
Christian BRUNEEL ◽  
Jean-Noël DECARPIGNY ◽  
Bertrand DUBUS
Keyword(s):  
Lithium Niobate ◽  
Far Field ◽  
Directivity Patterns
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