Title :
Sound shielding control of ear protectors with PVDF
Author :
Kodama, H. ; Date, M. ; Yamamoto, K. ; Fukada, E.
Author_Institution :
Kobayasi Inst. of Phys. Res., Kokubunji
Abstract :
Sound shielding control of ear protectors with PVDF was evaluated. Sound attenuation level of the PVDF ear muff without circuit control was 20 - 40 dB. When the circuit control was added, the attenuation level increased by 25 - 35 dB. The controllable frequency band of the circuit was from 3 kHz to 4.2 kHz by using a PVDF as a capacitor in the circuit.
Keywords :
acoustic devices; acoustic materials; acoustic variables control; acoustic wave absorption; conducting polymers; ear protection; piezoelectric devices; piezoelectric materials; piezoelectric thin films; polymer films; PVDF capacitor; PVDF ear muff; circuit control; controllable frequency band; ear protectors; frequency 3 kHz to 4.2 kHz; piezoelectric polyvinylidene fluoride; sound attenuation level; sound shielding control; Attenuation; Capacitance; Capacitors; Circuits; Ear; Feedback; Frequency; Protection; Strain control; Voltage;
Conference_Titel :
Electrets, 2008. ISE-13. 13th International Symposium on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4244-1850-3
Electronic_ISBN :
978-1-4244-1851-0
DOI :
10.1109/ISE.2008.4814065
