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1. (WO2018107171) FIBER MICROPHONE

Pub. No.:    WO/2018/107171    International Application No.:    PCT/US2017/065637
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Tue Dec 12 00:59:59 CET 2017
IPC: H04R 9/02
Applicants: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK
Inventors: RONALD, Miles
JIAN, Zhou
Title: FIBER MICROPHONE
Abstract:
A microphone, comprising at least two electrodes, spaced apart, configured to have a magnetic field within a space between the at least two electrodes; a conductive fiber, suspended between the at least two electrodes; in an air or fluid space subject to waves; wherein the conductive fiber has a radius and length such that a movement of at least a central portion of the conductive fiber approximates an oscillating movement of air or fluid surrounding the conductive fiber along an axis normal to the conductive fiber. An electrical signal is produced between two of the at least two electrodes, due to a movement of the conductive fiber within a magnetic field, due to viscous drag of the moving air or fluid surrounding the conductive fiber. The microphone may have a noise floor of less than 69 dBA using an amplifier having an input noise of 10nV / √Hz.