ACOUSTIC RADIATING STRUCTURE, ACOUSTIC CHAMBER, AND ACOUSTIC SCATTERING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain a good scattering effect in a broad frequency band without incurring upsizing of an acoustic radiating structure in a thickness direction, and degradation in designing degree-offreedom of a chamber. SOLUTION: The acoustic radiator structure 5 is formed of seven pipes 10-A1 to 10-A7. These pipes each have a cavity in their longitudinal direction, i.e., right and left directions as viewed in the figure. One end of each pipe is formed as an opening 11 and the other end is closed with a cover portion 12. Each pipe has an opening 13a formed in its side face 13. When sound enters from near side of the surface of the figure, a variety of sound waves are reradiated from the multiple openings 11 and openings 13a together with reflected sound.