The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 1994
Filed:
Jul. 14, 1992
Albert E Sanderson, Carlisle, MA (US);
Inventronics, Inc., Chelmsford, MA (US);
Abstract
A method and apparatus for tuning a musical instrument. Measurements are made of the inharmonicities of three notes (e.g., F3, A4 and C6 in a piano). One of the notes (e.g. A4) is a standard note that is to be tuned to a standard frequency. The measured inharmonicities of these notes determine a slope of a tuning curve and a position to intercept the standard note frequency according to the following: ##EQU1## Y(p,N) is the cents deviation relative to the equally tempered scale of partial p of note N, F is a factor by which the inharmonicity increases per octave taken from the measurement, B(N) is the inharmonicity of note N, and B(STD) is the inharmonicity factor of a standard note (e.g., A4 at 440 Hz).