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:
Jan. 06, 2026
Filed:
May. 04, 2023
Alps Alpine Co., Ltd., Tokyo, JP;
Keita Tanno, Fukushima, JP;
Osamu Shinohara, Fukushima, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
A sound output by an i-th audio source device is adjusted by an i-th sound leakage reduction filter with a frequency transfer function set in the i-th sound leakage reduction filter and is output from an i-th speaker toward a user. The frequency transfer function relatively reduces the volume of the sound at a frequency where a first gain of a frequency transfer function from the speaker to one or multiple predetermined sound leakage reference positions outside the vehicle tends to be high relative to a second gain of a frequency transfer function from the speaker to the user, and relatively increases the volume of the sound at a frequency where the first gain tends to be low relative to the second gain.