Silencer

A silencer comprising:

• a filter component that removes contaminants present in introduced air;
• an entry side path component that is connected to the filter component, and forms an entry path through which flows air that is introduced through the filter component;
• a casing that is connected to an end portion of the entry side path component that is on an opposite side from the filter component, and that forms a volume chamber that has a larger cross-sectional area than that of the entry path;
• an exit side path component that is connected to an end portion of the casing that is on the opposite side from the entry side path component, and that forms an exit path that has a smaller cross-sectional area than that of the volume chamber and through which flows air that has passed through the casing;
• and
• a sound absorption portion that has a cylindrical porous plate in which a plurality of micro holes have been formed, and that forms a sound absorption path that connects the entry side path component to the exit side path component in the interior of the casing, and that connects the end portion on the volume chamber side of the entry path to the end portion on the volume chamber side of the exit path on the inner circumferential side of the porous plate.