Title :
Rectangular loudspeaker by tuck shape PVDF bimorph
Author :
Ohga, J. ; Matsushita, K. ; Takei, T. ; Moriyama, N.
Author_Institution :
Shibaura Inst. of Technol., Tokyo, Japan
Abstract :
A bimorph sheet of PVDF (polyvinylidenfluoride) film is applied to a flat rectangular loudspeaker as a folded zigzag-tuck shape diaphragm whose size is, for example, 240 mm×114 mm. This loudspeaker is characterized by moderate size with a wide frequency range, light weight and no magnetic flux radiation. This paper shows measuring results of acoustical and electrical characteristics by using a few samples, and the output level is examined by theoretical calculations.
Keywords :
acoustic field; diaphragms; electric impedance; loudspeakers; polymer films; sensitivity analysis; 114 mm; 240 mm; PVDF film; acoustical characteristics; bimorph sheet; electrical characteristics; flat rectangular loudspeaker; folded zigzag-tuck shape diaphragm; light weight loudspeaker; polyvinylidenfluoride film; wide frequency range; Electric variables measurement; Frequency response; IEC standards; Impedance; Loudspeakers; Magnetic field measurement; Pressure measurement; Resonance; Resonant frequency; Shape;
Conference_Titel :
Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on
Print_ISBN :
0-7803-7560-2
DOI :
10.1109/ISE.2002.1042986
