ELECTROACOUSTIC CONVERSION FILM, ELECTROACOUSTIC TRANSDUCER, FLEXIBLE DISPLAY, VOCAL CORD MICROPHONE, AND SENSOR FOR MUSICAL INSTRUMENT

摘要

PROBLEM TO BE SOLVED: To provide an electroacoustic conversion film that has excellent flexibility and acoustic characteristics, and can output a stable voice even when deformed so as to achieve a flexible speaker that can be formed integrally with a flexible display; and an electroacoustic transducer using the electroacoustic conversion film; a flexible display; a vocal cord microphone; and a sensor for musical instruments.SOLUTION: An electroacoustic conversion film includes a polymer composite piezoelectric body 12 obtained by dispersing piezoelectric body particles 26 in a viscoelastic matrix 24 composed of polymer material having viscoelasticity at normal temperature, thin film electrodes 14 and 16 respectively formed on both surfaces of the polymer composite piezoelectric body 12, and protective layers 18 and 20 respectively formed on the surfaces of the thin film electrodes.