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. 07, 2025
Filed:
Jun. 12, 2023
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Takanobu Machida, Fukuoka, JP;
Abstract
An earphone includes a housing having a space therein and an air-permeable path from one end of an ear canal of a user to another end of the ambient environment, an opening and closing valve accommodated in the housing and capable of blocking a part of the path, a speaker accommodated in the housing and configured to output a sound signal, a first microphone configured to detect a leakage amount of a sound output from the speaker and leaking from an ear of the user, and a control unit configured to cause the speaker to output the sound signal. The control unit sets the opening and closing valve to an open state or a closed state based on a volume of the sound signal or the leakage amount of the sound.