SOUND ABSORPTION BLADE ADJACENT TO AIR INLET

摘要

PROBLEM TO BE SOLVED: To provide a sound absorption blade that is simply structured, able to be made compact and excellent in noise reduction efficiency. SOLUTION: A plurality of sound absorption blades are provided in parallel adjacently to an air inlet of a cover that covers noise source such as an engine and hydraulic device and has an air inlet for ventilation. The sound absorption blades absorb noise leaking from inside the cover to outside via the air inlet. The sound absorption blades are provided with a core material 12 with reflecting characteristics of sound and sound absorption member 14 attached on both sides thereof.