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:
Sep. 13, 2022
Filed:
Feb. 02, 2021
Applicant:
Acoustic Metamaterials Llc, Scarsdale, NY (US);
Inventor:
Gopal P. Mathur, Trabuco Canyon, CA (US);
Assignee:
ACOUSTIC METAMATERIALS LLC, Scarsdale, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10K 11/08 (2006.01); H04R 1/02 (2006.01); H04R 1/34 (2006.01);
U.S. Cl.
CPC ...
G10K 11/08 (2013.01); H04R 1/028 (2013.01); H04R 1/345 (2013.01); H04R 2499/11 (2013.01); H04R 2499/15 (2013.01);
Abstract
An acoustic meta material (AMM) spiral device for passive amplification of sound is described. The AMM amplifier device employs at least one deep sub-wavelength spiral design with high refraction index, based on an exponential spiral shape. The AMM spiral amplifier is used to focus on low frequency sound amplification and to cover broadband frequency range. Sound emanating from a speaker travels into a spiral channel until reaching the apex of the spiral. When twin spirals are used, the sound then enters a second spiral for radiating into open air.