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. 12, 1991
Filed:
Feb. 02, 1990
Applicant:
Inventors:
Joseph M Fala, Pasadena, CA (US);
Ajay K Keshap, Van Nuys, CA (US);
Mark S Doerning, Arcadia, CA (US);
Jay T Barbeau, Arcadia, CA (US);
Assignee:
Other;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G10H / ;
U.S. Cl.
CPC ...
84731 ; 84DI / ; 84DI / ;
Abstract
Note bending in a MIDI interfaceable fretted string instrument is detected by sensing relative phase shifting in an echo return of an ultrasonic acoustic signal propagated along each string. The delay between the propagated signal and echo return is indicative of the musical note obtainable by playing the string. The propagation and sensing may be accomplished by means of a single piezoelectric transducer coupled to each string, and the same transducer can sense string vibration in the audible frequency range indicative of the timing and amplitude of a musical note played on the string.