| 摘要 |
PROBLEM TO BE SOLVED: To provide a speaker apparatus capable of reproducing bass without generating wind noise and distortion even when large volume sound is generated. SOLUTION: The cross section of a port 4 is circular and the port 4 has a shape that a cross-sectional area is exponentially expanded from the center part of the port 4 to an aperture part. The inwall of the port 4 is expanded like a horn in the vicinity of the tip of the aperture part and connected to a baffle surface. In the port 4 of the shape, an air flow on the center part of the port 4 is rapid, but an air flow near the aperture part is sufficiently slow and wind noise is not generated. Since both aperture parts are symmetrical, an air flow outputted to the outside of a cabinet and an air flow into the inside of the cabinet can be uniformed and sound distortion can be reduced. Since the port 4 has the exponentially expanded shape, a sound wave generated from the port 4 is uniformly diffused as a spherical wave and a uniform sound field can be formed around the speaker apparatus. COPYRIGHT: (C)2006,JPO&NCIPI
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