DocumentCode :
957855
Title :
Sound isolation by piezoelectric polymer films connected to negative capacitance circuits
Author :
Fukada, E. ; Date, M. ; Kimura, K. ; Okubo, T. ; Kodama, H. ; Mokry, P. ; Yamamoto, K.
Author_Institution :
Kobayasi Inst. of Phys. Res., Tokyo, Japan
Volume :
11
Issue :
2
fYear :
2004
fDate :
4/1/2004 12:00:00 AM
Firstpage :
328
Lastpage :
333
Abstract :
Sound isolation has been achieved using a piezoelectric polymer film connected to a negative capacitance feedback circuit. A curved PVDF film was located in the middle of an acoustic tube and the transmission loss of sound through the film was determined in the audio frequency range. At any chosen frequency, the complete isolation of sound was achieved by adjusting the feedback, i.e. the complex capacitance of the circuit was matched precisely to that of the film.
Keywords :
capacitance; piezoelectric materials; polymer films; PVDF film; acoustic tube; audio frequency range; negative capacitance circuits; piezoelectric polymer films; sound isolation; sound transmission loss; Capacitance; Capacitive sensors; Electrodes; Feedback circuits; Piezoelectric films; Piezoelectric materials; Piezoelectric polarization; Polymer films; Vibrations; Voltage;
fLanguage :
English
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
Publisher :
ieee
ISSN :
1070-9878
Type :
jour
DOI :
10.1109/TDEI.2004.1285904
Filename :
1285904
Link To Document :
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