Nissan Motor Company Limited

Mahle Filter Systems Japan Corporation

Hiromichi Akamatsu

Hiroyuki Abe

Akira Sasaki

Yuta Saito

Masashi Shinada

Shunsuke Ebata

Hiroshi Miyauchi

A sound increase apparatus includes a partition wall adapted to divide an engine room for defining a first engine room space that is located on a side of a dash panel and a second engine room space in which an engine is installed, and a first pressure fluctuation amplification unit inter-communicating an engine inlet pipe arranged in the second engine room space and the first engine room space. The first pressure fluctuation amplification unit amplifies a pressure fluctuation of a first frequency selected from a plurality of frequencies when pressure of air residing inside the engine inlet pipe fluctuates at the plurality of frequencies.

Sound increase apparatus

An amplification device for amplifying suction noise of a vehicle is disclosed herein. An embodiment of the amplification device comprises an intake duct, a connecting pipe, an elastic membrane member and a contact member. The intake duct feeds air into an engine inlet port. A connecting pipe is connected to an interior of the intake duct. The elastic membrane member blocks a passageway inside of the contacting pipe. The contact member is connected to the connecting pipe and includes at least one portion that is adapted to selectively contact a surface of the elastic membrane member that faces the intake duct.

Device and method for amplifying suction noise

Growing community of inventors

Tokyo, Japan

Hiromichi Akamatsu