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. 05, 2023
Filed:
Jul. 10, 2020
Fujifilm Corporation, Tokyo, JP;
Shinya Hakuta, Ashigara-kami-gun, JP;
Shogo Yamazoe, Ashigara-kami-gun, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Provided is a soundproof structure that is small and light and can reduce a noise with a high specific frequency of a sound source at a plurality of frequencies at the same time. A soundproof structure includes a plate-like member in which at least one through-hole is formed, a membrane-like member that is disposed to face one surface of the plate-like member, and a support that is formed of a rigid body and supports the plate-like member and the membrane-like member, in which the membrane-like member is supported by the support so as to perform membrane vibration, in which a first space is provided between the plate-like member and the membrane-like member, in which a rear surface space is provided on a side opposite to the first space with the membrane-like member sandwiched therebetween, in which the membrane-like member, the support, and the rear surface space form a first sound absorbing portion that absorbs a sound by membrane vibration, in which the plate-like member having the through-hole, the support, the membrane-like member, and the first space form a second sound absorbing portion that absorbs a sound by Helmholtz resonance, and in which assuming that a fundamental frequency of the Helmholtz resonance in a case where the membrane-like member is regarded as the rigid body in the second sound absorbing portion is fand a fundamental frequency of the membrane vibration of the second sound absorbing portion is denoted by f, f≥2×fis satisfied.