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. 07, 1999
Filed:
Aug. 13, 1997
Applicant:
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
381328 ; 381380 ;
Abstract
An earphone with an improved frequency response includes an electroacoustic transducer for converting an audio signal to an acoustic sound and an ear piece. The ear piece is provided on a sound emanating side of the electroacoustic transducer to introduce sound produced by the electroacoustic transducer to the external auditory meatus. An opening for opening an air chamber formed on the sound emanating side of the electroacoustic transducer to the outside by the ear piece is provided in the ear piece and a ventilation resistant material is provided to cover the opening.