| 摘要 |
PURPOSE:To prevent improper vibrations due to the reflection of back pressure by arranging plural small-diameter spakers closely and vertically, fixing small- diameter pipes to back surfaces of those speakers without leaking the back pressure of the speakers, and opening them in a resonance box. CONSTITUTION:The plural small-diameter speakers 2 are arranged vertically and closely to form a speaker group 4. Then, the small-diameter pipes 12 are fixed to their reverse surfaces without leaking the back pressure of the speakers 2, and the other-side ends of the pipes 12 are opened in the resonance box 4 having a release opening 13. Consequently, the back pressure of the diaphragm of the speakers 2 is held constant, and there is no reflection of the back pressure from wall surfaces, etc., of the box body and chamber to eliminate improper vibrations of the diaphragms of the spakers 2 due to the reflection of the back pressure. |
