Nokia Corporation

Nokia Technologies Oy

Oleksandr Kononenko

Martti Voutilainen

Toni Peter Strandell

James Francis Reilly

Davin Wong

Martti Kalevi Voutilainen

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 to produce 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.

Acoustic apparatus and associated methods

A method for handling meta data of media objects, comprising creating a media object at a mobile electronic device, obtaining at least one rule defining modifications for positional data relating to at least one geographical area, determining positional data relating to the current geographical position of said mobile electronic device, applying said at least one rule to said positional data to derive positional meta data if said positional data relate to said at least one geographical area, deriving positional meta data from said determined positional data if said determined positional data do not relate to said at least one geographical area, and associating said positional meta data with said media object. An electronic device capable of performing the method is also provided.

Method and device for modifying meta data of media objects

Growing community of inventors

Helsinki, Finland

Oleksandr Kononenko