Patent ID: 8485310

Claim:
Silencing equipment for electronic devices, the silencing equipment being adapted to be installed to an electronic device having a fan that blows cooling air to cool a heat generating section, the silencing equipment comprising: a flow channel forming member that forms a flow channel through which the cooling air flows, wherein an aperture is provided in a portion of the flow channel forming member; a cavity communicating with the aperture and formed by bending the flow channel forming member; a slide member configured to slide via a slide mechanism, wherein the slide member is provided on top of the aperture to adjust an area of the top of the aperture; and acoustic absorbent members, wherein the acoustic absorbent members are attached to the flow channel forming member and the slide member, wherein the aperture and the cavity form a resonance type silencer on a wall surface of the flow channel by making a cross sectional area of at least one part of the cavity larger than that of an interface between the aperture and the cavity.