Sound absorbing device, electronic device, image forming apparatus and option device of image forming apparatus

摘要

PROBLEM TO BE SOLVED: To provide noise absorption equipment that uses Helmholtz resonators and can suppress a reduction in the noise absorption effect caused by the generation of a gap at a junction of members that form cavity parts with an inexpensive configuration, and an electronic apparatus, image forming device, and option device for the image forming device including the same.SOLUTION: In noise absorption equipment 600 that forms a cavity part 601 of a Helmholtz resonator with a plurality of wall surface forming members including a resonator forming member 2 and a resonator attachment member 1, a lockscrew 3 is provided as fixing means for pressing the resonator forming member 2 against the resonator attachment member 1 and fixing the resonator forming member 2 and the resonator attachment member 1 while the resonator forming member is elastically deformed.