| 摘要 |
PROBLEM TO BE SOLVED: To reduce abnormal noise radiated from a bass reflex port sufficiently.SOLUTION: A bass reflex port 30 is a tube having side ends 34 (342, 344) located on both sides of an intermediate portion 32, and interconnects the inside and outside of the housing of a speaker device. The inner peripheral region surrounded by the inner peripheral surface 42 of the side edge 34 is non-circular of 5-fold symmetry about the central axis X, and the area of the inner peripheral region increases from the proximal end to the distal end of the side end 34. The crest and valley of the inner peripheral surface 42 extend spirally. |
