Sound absorbing characteristic design method of flexible sound absorbing material, sound absorbing body, acoustic diffuser, and sound processing body

摘要

To provide a wooden sound absorbing material which is flexible enough to form a curved surface by deformation.SOLUTION: A flexible sound absorbing material 5 is comprised of a wooden plate material 1, on whose front and back surfaces a plurality of grooves 2 are provided alternately and in parallel on the front and back surfaces, and at least one of the front and back surfaces has resonance type sound absorbing structures 3 having a resonance type sound absorbing characteristic are provided. That is, the resonance type sound absorbing structures 3 (cut portion) are provided on one surface of the basic material in which a plurality of grooves 2 in a predetermined form are provided on the front and back surfaces of the plate material 1.EFFECT: Although a high sound absorption effect in the mid-high range cannot be expected due to plate vibration type sound absorption characteristics with the basic material as it is, in the configuration of this flexible sound absorption material 5, Helmholtz resonator type sound absorption characteristics can be obtained, because of having the resonance type sound absorbing structures 3.SELECTED DRAWING: Figure 1-4