Любопытно, а где почить, про сам принцип?
Publication number: 20080134867 Abstract: The musical instrument has a acoustic transducer, which transforms an excitation signal generated by at least one resonator into an acoustic signal. The acoustic transducer is provided with an adjustable oscillation profile, in which at least one profile parameter is defined by a reference profile of a reference instrument. Type: Application Filed: July 27, 2007 Publication date: June 12, 2008 Inventor: Christoph Kemper
Patent History
Publication number: 20080134867
Type: Application
Filed: Jul 27, 2007
Publication Date: Jun 12, 2008
Patent Grant number: 8796530
Inventor: Christoph Kemper (Bochum)
Application Number: 11/881,818
Classifications
Current U.S. Class: Transducers (84/723)
International Classification: G10H 3/00 (20060101)
https://patents.justia.com/patent/20080134867... и добавил:про срок действия патента может быть в другом месте. не помню где
там было написано про15 или 17 лет .
но в интернетах называли дату истечения кемпера монополии именно 15 июня 2022
... и добавил:гугл картинку нашел
https://patents.google.com/patent/US20080134867A1/en