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Audio Signal Processing

Cabinet-for-loudspeaker

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Cabinet for loudspeaker

Details

Inventors: Yamamoto, Shuji;
Assignee: Bose Corporation (Framingham, MA)
Primary Examiner: Fuller; Benjamin R.
Assistant Examiner:
Attorney, Agent or Firm: Hieken; Charles

A cabinet for a loudspeaker is disclosed, which has a duct communicating the inside and outside of the cabinet. The duct includes a first duct section open to the inside of the cabinet and having a substantially constant sectional area and a second duct section extending from the first duct section toward the outside of the cabinet, the sectional area of the second duct section being gradually increased from the first duct section toward the outside of the cabinet.

DETAILED DESCRIPTION It is an object of the present invention to provide a cabinet for a loudspeaker, that does not cause sound including a distortion due to air passing through the duct.
According to the present invention, there is provided a cabinet for mounting a loudspeaker, which comprises duct means communicating with the inside and outside of the cabinet, the duct including a first duct section open to the inside of the cabinet and having a substantially constant cross-sectional area and a second duct section extending from the first duct section toward the outside of the cabinet, the cross-sectional area of the second duct section being gradually increased from the first duct section toward the outside of the cabinet.
According to the present invention, the cross-sectional area of the second duct section that forms an outlet portion of the duct, through which air is let out to the outside of the cabinet, is gradually increased toward the outlet.
Therefore, as air inside the cabinet is let out to the outside through the duct, its pressure is gradually reduced through the second duct section.
That is, air pressure is gradually reduced, so that no audibly distorting vortex flow is produced.
It is thus possible to cause no sound including a distortion due to air noted above.

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