Title :
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
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;
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
DOI :
10.1109/SPAWDA.2009.5428937
