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. 06, 2012
Filed:
Apr. 03, 2009
Yasuhito Watanabe, Kanagawa, JP;
Yasuhito Watanabe, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
First, in a state where a pair of earphonesare worn in both ears of a listening person, a measurement signal generated by a measurement signal generating sectionis outputted from the earphone. The signal (wearing-state signal) which is reflected by an eardrum and returns to the earphoneis measured, and stored in an analysis section. Next, in a state where the pair of earphonesare not worn in both ears of the listening person, a signal measured (unwearing-state signal) in the same manner as described above is stored in the analysis section. The analysis sectioncalculates an ear-canal correction filter based on a difference between the wearing-state signal and the unwearing-state signal. An ear-canal correction filter processing sectionconvolves a sound source signal with the calculated ear-canal correction filter.