Pressure fluctuation absorbing structure

A pressure fluctuation absorbing structure, comprising:

• an acoustic absorption panel body including:
• a perforated member including a plurality of holes for absorbing pressure fluctuation on a surface thereof, and
• a plurality of cells that are provided to a back surface of the perforated member and communicate with the plurality of holes,
• a partition member disposed on the surface of the perforated member and including:
• a partition wall that partitions the plurality of holes into units of a predetermined number of one or more holes, and
• a space that is formed by the partition wall and corresponds to the predetermined number of one or more holes and the plurality of cells,
• a fine-perforated thin film that is disposed on the partition member away from the perforated member to cover the space and includes a plurality of small holes perforated in a region corresponding to the space, wherein
• a total opening area of the plurality of small holes of thin film provided in the region corresponding to the space is larger than a total opening area of the predetermined number of one or more holes of the perforated member corresponding to the space, and
• a depth of the space is larger than a diameter of the plurality of holes of the perforated member.