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:
Jun. 03, 2025
Filed:
Aug. 27, 2020
Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno, 's-Gravenhage, NL;
Hylke Broer Akkerman, Rosmalen, NL;
Paul Louis Maria Joseph Van Neer, Bergschenhoek, NL;
Arno Willem Frederik Volker, Delft, NL;
Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's-Gravenhage, NL;
Abstract
An acoustic device () comprises an array of acoustic membranes () formed on a foil (). Each of the acoustic membranes () is configured to vibrate at a resonance frequency (Fr) of the acoustic membranes () for generating respective acoustic waves (W,W,W,W). Relative phases (ΔΦ) are determined at which the acoustic membranes () are actuated for generating a predetermined interference pattern (C) between the acoustic waves (W,W,W,W). A lamb wavelength (As) is determined of lamb waves (Ws) at the resonance frequency (Fr) travelling through intermediate sections (lOi, lOj) of the foil () between adjacent acoustic membranes (). Distances (X,X) of the intermediate sections () between the adjacent acoustic membranes () in the layout are determined in accordance with the relative phases (ΔΦ) and the lamb wavelength (λs) for having the lamb waves (Ws), generated by one acoustic membrane (), arrive in phase with an adjacent acoustic membrane ().