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:
Nov. 23, 1999
Filed:
Dec. 13, 1996
Daniel P Anagnos, Grandview, NY (US);
Sony Corporation, Tokyo, JP;
Sony Electronics, Inc., Park Ridge, NJ (US);
Abstract
An arrangement for minimizing acoustic reflections and diffraction from an exterior surface of a diaphragm of a loudspeaker transducer. A layer of highly optimized acoustic foam is applied to an exterior surface of the transducer diaphragm. The acoustic foam is a polyether urethane material of approximately 2 lb/ft.sup.3 density with a skinned bottom surface, optional skinned top surface and optimized cell size and structure. The foam is die cut into a shape to conform to the concave shape of the transducer diaphragm without large air gaps or deformation of the foam. The acoustic foam surface prevents reflection and diffraction of another transducer's output off of the diaphragm of the treated transducer and provides a low pass filtering of the acoustic output of the treated transducer.