Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : July 18, 2024
A study was conducted using COMSOL Multiphysics analysis software to investigate a method for reducing low-frequency noise incident on residential houses. A restriction has been placed on the depth of installed devices to be within 300mm. As a solution, we proposed a device made by folded resonator with quarter-wavelength. The device is fabricated from cardboard, and it is applied to a field test using a simulated house. Noise reduction performance is investigated by measuring the three-dimensional sound pressure distribution in the room. The results show that the installation of the device significantly changes the sound pressure distribution in the room and, in particular, suppresses the increase in sound pressure at all corners of the room. The average sound pressure level on the floor can be reduced by up to 5 dB.
