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1. (WO2018200886) PROGRAMMABLE ELECTRONIC HARMONICA HAVING BIFURCATED AIR CHANNELS

Pub. No.:    WO/2018/200886    International Application No.:    PCT/US2018/029665
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Fri Apr 27 01:59:59 CEST 2018
IPC: G10H 1/00
G10H 3/14
Applicants: SCHILLE, Ron Lewis
Inventors: SCHILLE, Ron Lewis
Title: PROGRAMMABLE ELECTRONIC HARMONICA HAVING BIFURCATED AIR CHANNELS
Abstract:
A wind instrument such as an electronic harmonica has a means for generating an electrical output signal from strain gages exposed to airflow in the channels. First and second strain gages having variable flow-induced resistance are bonded to a flexible substrate and suspended within an air channel, which includes a divider shelf for directing a first airflow to the first strain gage and a second airflow to the second strain gage. Complimentary strain gages are mounted to an opposite side of the substrate for inverse flexure to enable temperature correction for the first and second strain gages. Forcing air through a channel toward a divider shelf a difference signal is generated by the first and second strain gages and detected by comparing their outputs. The difference signal can be used to adjust a variable control signal in applications such as volume control, dimming lights, or bending notes.