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:
Oct. 02, 2012
Filed:
Dec. 16, 2009
Ali Berker, Saint Paul, MN (US);
Richard W. Greger, Saint Paul, MN (US);
Marie Aloshyna Ep Lesuffieur, Woodbury, MN (US);
Michael Patrick M. Mandanas, Little Canada, MN (US);
Sanat Mohanty, Woodbury, MN (US);
David A. Ylitalo, Stillwater, MN (US);
Patrick G. Zimmerman, Mendota Heights, MN (US);
Ali Berker, Saint Paul, MN (US);
Richard W. Greger, Saint Paul, MN (US);
Marie Aloshyna ep Lesuffieur, Woodbury, MN (US);
Michael Patrick M. Mandanas, Little Canada, MN (US);
Sanat Mohanty, Woodbury, MN (US);
David A. Ylitalo, Stillwater, MN (US);
Patrick G. Zimmerman, Mendota Heights, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A sound insulation process comprises (a) providing at least one sound insulation device comprising at least one sound barrier comprising at least one substantially periodic array of structures disposed in a first medium having a first density, the structures being made of a second medium having a second density different from the first density, wherein one of the first and second media is a viscoelastic medium having a speed of propagation of longitudinal sound wave and a speed of propagation of transverse sound wave, the speed of propagation of longitudinal sound wave being at least about 30 times the speed of propagation of transverse sound wave, and wherein the other of the first and second media is a viscoelastic or elastic medium; and (b) interposing the sound insulation device between an acoustic source area and an acoustic receiving area of a transportation vehicle.