Wave propagation and reflection coefficient in electrorheological fluids

Author

Ding, Lv-hui ; Huang, Qi-bai ; Yang, Dan ; Zhang, Qian

Author_Institution

Sch. of Mech. Sci.&Eng., Huazhong Univ. Sci.&Tech., Wuhan, China

fYear

2009

fDate

17-20 Dec. 2009

Firstpage

65

Lastpage

65

Abstract

This paper analyzes acoustic attenuation and velocity of acoustic wave in electrorheological fluid (ERF) using the Biot theory in establishing the theoretical model. Then impedance-matching properties of ERF, whose specific acoustic impedance varies smoothly across the ERF, from the effective value of the transducer specific acoustic impedance to the value of the output medium specific acoustic impedance, is analyzed with the transmission matrix method and get the reflection coefficient of ERF. This impedance matching technology (IMT) is the most effective for active noise control.

Keywords

acoustic impedance; acoustic wave absorption; acoustic wave propagation; acoustic wave velocity; active noise control; electrorheology; Biot theory; acoustic attenuation; acoustic wave velocity; active noise control; electrorheological fluids; impedance matching properties; impedance matching technology; output medium specific acoustic impedance; reflection coefficient; transducer specific acoustic impedance; transmission matrix method; Acoustic materials; Acoustic propagation; Acoustic reflection; Acoustic transducers; Acoustic waves; Active matrix technology; Attenuation; Composite materials; Impedance matching; Surface impedance; Biot theory; Electrorheological fluid; acoustic attenuation; impedance matching technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Piezoelectricity, Acoustic Waves, and Device Applications (SPAWDA) and 2009 China Symposium on Frequency Control Technology, Joint Conference of the 2009 Symposium on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-4950-7

Type

conf

DOI

10.1109/SPAWDA.2009.5428937

Filename

5428937