Presentation	2011-08-10 Acoustic Radiation Characteristics of Prolate Spheroid Kiyoshi SUGIYAMA,
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Abstract(in English)	When prolate spheroids vibrate with the direction of the short axis(x-axis), directivity, frequency characteristics and acoustic radiation impedance of prolate spheroids are calculated. In this report, vibration modes treat four types, 1) expansive and compressive vibration with the direction of the x-axis, 2) vibration like a piston with the constant velocity in the direction of the x-axis, 3) vibration like a piston with positive amplitude in the direction of the x-axis, while the outer parts vibrate with negative amplitude, 4) vibration like a piston with the positive amplitude in the positive direction of the x-axis, while the outer parts remain still.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	Prolate spheroid / prolate spheroidal wave functions / directivity / acoustic radiation impedance
Paper #	EA2011-60
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Conference Information
Committee	EA
Conference Date	2011/8/2(1days)
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Paper Information
Registration To	Engineering Acoustics (EA)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Acoustic Radiation Characteristics of Prolate Spheroid
Sub Title (in English)
Keyword(1)	Prolate spheroid
Keyword(2)	prolate spheroidal wave functions
Keyword(3)	directivity
Keyword(4)	acoustic radiation impedance
1st Author's Name	Kiyoshi SUGIYAMA
1st Author's Affiliation	Professor emeritus, Faculty of Engineering, Tokyo Polytechnic University()
Date	2011-08-10
Paper #	EA2011-60
Volume (vol)	vol.111
Number (no)	175
Page	pp.pp.-
#Pages	6
Date of Issue