FILTER PARTICULARLY FOR FILTERING INTAKE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To inexpensively manufacture a filter for filtering intake air of an internal combustion engine, and remarkably reduce the intake noises of the intrenal combustion engine. SOLUTION: A casing part 13 surrounding at least the raw air area has a grid foundation structure 19 which is enveloped in a sound-damping material.