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1. WO2017077176 - AN ACOUSTIC APPARATUS AND ASSOCIATED METHODS

Publication Number WO/2017/077176
Publication Date 11.05.2017
International Application No. PCT/FI2016/050702
International Filing Date 07.10.2016
IPC
H04R 17/00 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
17Piezo-electric transducers; Electrostrictive transducers
H04R 7/02 2006.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7Diaphragms for electromechanical transducers; Cones
02characterised by the construction
CPC
H04R 17/00
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
17Piezo-electric transducers; Electrostrictive transducers
H04R 2307/023
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
2307Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
023Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
H04R 2400/01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
2400Loudspeakers
01Transducers used as a loudspeaker to generate sound aswell as a microphone to detect sound
H04R 7/02
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7Diaphragms for electromechanical transducers
02characterised by the construction
H04R 7/06
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
7Diaphragms for electromechanical transducers
02characterised by the construction
04Plane diaphragms
06comprising a plurality of sections or layers
Applicants
  • NOKIA TECHNOLOGIES OY [FI]/[FI]
Inventors
  • VOUTILAINEN, Martti
  • KONONENKO, Oleksandr
Agents
  • NOKIA TECHNOLOGIES OY
  • UUSITALO, Arttu
Priority Data
15193289.405.11.2015EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) AN ACOUSTIC APPARATUS AND ASSOCIATED METHODS
(FR) APPAREIL ACOUSTIQUE, ET PROCÉDÉS ASSOCIÉS
Abstract
(EN) An apparatus comprising a piezoelectric diaphragm positioned between opposing first and second electrodes, the piezoelectric diaphragm comprising a stack of graphene oxide layers between respective electrode-engaging layers of reduced graphene oxide, wherein the apparatus is configured to have one or more of a sound output mode and a sound input mode such that: in the sound output mode, the first and second electrodes are configured to apply a voltage to the reduced graphene oxide layers to generate an electric field across the graphene oxide stack, the generated electric field causing vibration of the piezoelectric diaphragm toproduce a sound output wave corresponding to the applied voltage, and in the sound input mode, the reduced graphene oxide layers are configured to collect electrical charge which is induced in the graphene oxide layers by vibration of the piezoelectric diaphragm in response to a sound input wave, the collected electrical charge creating a voltage between the first and second electrodes corresponding to the sound input wave.
(FR) L’invention concerne un appareil comprenant une membrane piézoélectrique placée entre des première et seconde électrodes, la membrane piézoélectrique comprenant un empilement de couches d'oxyde de graphène entre des couches de mise en prise d'électrode respectives d'oxyde de graphène réduit. L'appareil est configuré pour avoir un ou plusieurs d’un mode de sortie sonore et d’un mode d'entrée sonore. Dans le mode de sortie sonore, les première et seconde électrodes sont configurées pour appliquer une tension sur les couches d'oxyde de graphène réduit et générer ainsi un champ électrique à travers l’empilement de couches d'oxyde de graphène, le champ électrique généré provoquant la vibration de la membrane piézoélectrique pour produire une onde de sortie sonore correspondant à la tension appliquée. Dans le mode d'entrée sonore, les couches d'oxyde de graphène réduit sont configurées pour collecter une charge électrique qui est induite dans les couches d'oxyde de graphène par la vibration de la membrane piézoélectrique en réponse à une onde d'entrée sonore, la charge électrique collectée créant une tension entre les première et seconde électrodes correspondant à l'onde d'entrée sonore.
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