Art

J-GLOBAL ID：201702215696087531   Reference number：17A1619421

Extension of the frequency range of normal-incidence sound-absorption-coefficient measurement using four or eight microphones

4または8マイクロホンを用いた垂直入射音波吸収係数測定の周波数範囲の拡大

Author (1)： Sanada Akira (Industrial Technology Center of Okayama Prefecture)
Material： Acoustical Science and Technology (Web)  (Acoust Sci Technol (Web))
Volume： 38  Issue： 5  Page： 261-263(J-STAGE)  Publication year： 2017 
JST Material Number： U0399A  ISSN： 1347-5177  Document type： Article
Article type： 短報  Country of issue： Japan (JPN)  Language： ENGLISH (EN)

Thesaurus term： *acoustic wave absorption ,  *microphone ,  transfer function ,  acoustic impedance ,  acoustic mode ,  *acoustic measurement ,  incidence ,  *frequency dependence ,  pipe ,  ratio
Semi thesaurus term： normal incidence ,  acoustic tube ,  *sound absorption coefficient

Author keywords (4)： Normal-incidence sound absorption coefficient ,  Acoustic impedance tube ,  Transfer-function method ,  Higher-order acoustic mode

JST classification (1)： Acoustical measurements and instrumentation  (BB03040R)

Reference (3)：

• 1) ISO 10534-2, Acoustics–Determination of sound absorption coefficient and impedance in impedance tubes –Part 2: Transfer-function method (1998).
• 2) M. Åbom, ``Modal decomposition in ducts based on transfer function measurements between microphone pairs,'' J. Sound Vib., 135, 95-114 (1989).
• 3) T. Schultz, L. N. Cattafesta III and M. Sheplak, ``Modal decomposition method for acoustic impedance testing in square ducts,'' J. Acoust. Soc. Am., 120, 3750-3758 (2006).

Terms in the title (5)： マイクロホン ,  垂直入射 ,  音波 ,  吸収係数 ,  拡大