Title:
An electroacoustic transduction film and a digital speaker
Document Type and Number:
Japanese Patent JP6216885
Kind Code:
B2
Abstract:
Provided is an electro-acoustic conversion film that is suitably used for a digital speaker or the like, and that includes a polymer composite piezoelectric body formed by dispersing piezoelectric particles in a viscoelastic matrix formed of a polymer material having viscoelasticity at room temperature, and thin-film electrodes provided on both surfaces of the polymer composite piezoelectric body, in which at least one of the thin-film electrodes is divided into a plurality of regions having the same area, and the respective regions are coupled in parallel and grouped to correspond to a weight of each bit digit of a parallel PCM digital signal. Thus, an electro-acoustic conversion film by which a digital speaker in which reverberation or crosstalk between segments is suppressed is obtained is provided.
Inventors:
Satoshi Miyoshi
Application Number:
JP2016531342A
Publication Date:
October 18, 2017
Filing Date:
June 26, 2015
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
H04R17/00; H04R3/00; H04R7/02; H04R7/04
Domestic Patent References:
| JP59095796A | ||||
| JP2014014063A | ||||
| JP60184398U |
Foreign References:
| US5062085 |
Attorney, Agent or Firm:
Nozomi Watanabe
Haruko Sanwa
Hideaki Ito
Fumio Mitsuhashi
Haruko Sanwa
Hideaki Ito
Fumio Mitsuhashi
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