Title :
Electro-acoustic transducers with cellular polymer electrets
Author :
Yasuno, Y. ; Kodama, H. ; Date, M. ; Furukawa, T.
Author_Institution :
Kobayasi Inst. of Phys. Res., Tokyo, Japan
Abstract :
The possibility of finding range from the propagation delay time was confirmed in the short-distance domain. The sound pressure level of the regular dodecahedron Tx reached 103 dB / 78 Vims at lm and a frequency of 140 kHz. The regular dodecahedron Tx exhibited almost omnidirectional directivity for M-series pseudorandom noise.
Keywords :
acoustoelectric transducers; electrets; piezoelectric materials; polymers; M-series pseudorandom noise; cellular polymer electrets; electro-acoustic transducers; frequency 140 kHz; gain 103 dB; omnidirectional directivity; piezoelectric materials; propagation delay time; regular dodecahedron Tx; short-distance domain; sound pressure level; voltage 78 V; Atmospheric measurements; Noise; Particle measurements; Rotation measurement; Transducers;
Conference_Titel :
Electrets (ISE), 2011 14th International Symposium on
Conference_Location :
Montpellier
Print_ISBN :
978-1-4577-1023-0
DOI :
10.1109/ISE.2011.6085063
