US 12,245,513 B2
Sound pressure-electrical signal conversion device and conversion method for same
Manabu Yoshida, Tsukuba (JP); Naoki Shirakawa, Tsukuba (JP); and Nobuko Fukuda, Tsukuba (JP)
Assigned to National Institute of Advanced Industrial Science and Technology, Tokyo (JP)
Appl. No. 17/625,997
Filed by National Institute of Advanced Industrial Science and Technology, Tokyo (JP)
PCT Filed Jun. 12, 2020, PCT No. PCT/JP2020/023282
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/010072, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-130123 (JP), filed on Jul. 12, 2019.
Prior Publication US 2022/0278267 A1, Sep. 1, 2022
Int. Cl. H10N 30/87 (2023.01); H04R 17/00 (2006.01); H04R 19/01 (2006.01); H10N 30/00 (2023.01); H10N 30/30 (2023.01)
CPC H10N 30/87 (2023.02) [H04R 17/005 (2013.01); H04R 19/016 (2013.01); H10N 30/30 (2023.02); H10N 30/704 (2024.05)] 12 Claims
OG exemplary drawing
 
1. A sound pressure-electrical signal conversion device including a polymer sheet sandwiched between a pair of electrodes facing each other, wherein:
the polymer sheet is an insulating dielectric film and insulates the pair of electrodes from each other,
at least one of the electrodes includes
an insulating flexible substrate having a plurality of through-holes and
a plurality of conductive fibers having a part fixed to the flexible substrate and a movable part, wherein electrical conduction in an in-plane direction is formed by contact between the conductive fibers,
the conductive fibers individually function as vibrators, and
the conductive fibers are vibrated by giving an electrical signal to the pair of electrodes to generate sound pressure, or the conductive fibers are vibrated by receiving sound pressure to cause the pair of electrodes to output an electrical signal.
 
9. A sound pressure-electrical signal conversion method using a sound pressure-electrical signal conversion device including a polymer sheet sandwiched between a pair of electrodes facing each other, wherein:
the polymer sheet is an insulating dielectric film and insulates the pair of electrodes from each other,
at least one of the electrodes includes an insulating flexible substrate having a plurality of through-holes and a plurality of conductive fibers having a part fixed to the flexible substrate and a movable part, wherein electrical conduction in an in-plane direction is formed by contact between the conductive fibers,
the conductive fibers individually function as vibrators, and
the conductive fibers are vibrated by giving an electrical signal to the pair of electrodes to generate sound pressure, or the conductive fibers are vibrated by receiving sound pressure to cause the pair of electrodes to output an electrical signal.