US 11,654,841 B2
Box-shaped soundproof structure and transportation apparatus
Shinya Hakuta, Ashigara-kami-gun (JP); and Shogo Yamazoe, Ashigara-kami-gun (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Mar. 25, 2020, as Appl. No. 16/829,816.
Application 16/829,816 is a continuation of application No. PCT/JP2018/037935, filed on Oct. 11, 2018.
Claims priority of application No. JP2017-197362 (JP), filed on Oct. 11, 2017; and application No. JP2018-079679 (JP), filed on Apr. 18, 2018.
Prior Publication US 2020/0223375 A1, Jul. 16, 2020
Int. Cl. B60R 13/08 (2006.01); G10K 11/162 (2006.01); G10K 11/172 (2006.01); B60K 6/22 (2007.10)
CPC B60R 13/0884 (2013.01) [G10K 11/162 (2013.01); G10K 11/172 (2013.01); B60K 6/22 (2013.01); B60Y 2200/91 (2013.01); B60Y 2200/92 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A box-shaped soundproof structure comprising:
a box at least a part of which is opened, and
a sound reduction structure including a resonator disposed in the box,
wherein the resonator includes a frame at least one surface of which is opened, and a membrane-like member disposed on an open surface of the frame,
the membrane-like member is a resonator that performs membrane vibration,
the membrane-like member is in contact only with the frame,
a normal incidence sound absorption coefficient in a high-order vibration mode is greater than a normal incidence sound absorption coefficient in a fundamental vibration mode of the membrane vibration of the resonator that performs the membrane vibration, and
an airborne sound generated from a sound source disposed in the box and emitted from an open surface of the box to the outside is reduced by the sound reduction structure.