Electroacoustic conversion film, method for producing electroacoustic conversion film and electroacoustic transducer
2016
Provided are: an electroacoustic conversion film which is capable of reproduction with a sufficient sound volume and has high heat dissipation properties, while being suppressed in sound pressure change over time; a method for producing an electroacoustic conversion film; and an electroacoustic transducer. This electroacoustic conversion film is obtained by laminating: a polymer composite piezoelectric body which is obtained by dispersing piezoelectric particles in a viscoelastic matrix that is formed of a polymer material which has viscoelasticity at room temperature; two thin film electrodes which are respectively laminated on both surfaces of the polymer composite piezoelectric body; and two protective layers which are respectively laminated on the two thin film electrodes. This electroacoustic conversion film has a projected part that is molded to have a convex shape protruding on one main surface side, and the ratio of the molded height H of the projected part to the breadth Ds of the projected part when viewed from a direction perpendicular to the main surface, namely H/Ds satisfies 0 < H/Ds ≤ 0.15.
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