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:
Aug. 31, 2004
Filed:
Jun. 02, 2003
Theodore R. Arneson, Ivanhoe, IL (US);
Mark A. Barabolak, Elmhurst, IL (US);
Giles T. Davis, Mundelein, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A portable device includes a speaker with an active vent fed by a front of a speaker diaphragm and a larger passive vent fed by a rear of the speaker diaphragm. The outputs of the active and passive vents are acoustically coupled to respective active and passive ports, coupled together outside of the housing within an ear placement region for a user of the portable electronic device to obtain a more uniform frequency response from the speaker configuration over a larger region of a user's ear placement possibilities than would be available with the active vent alone. This is accomplished by a close acoustic coupling of the ports in combination with diverse porting of active and passive acoustic signals. The passive path also serves to relieve pressure near a user's ear to improve signal quality.