Patent ID: 6654472
Filing Date: 2003-11-25
Classification: H04R

Abstract:
A speaker system in a display, comprising:a speaker for presenting a sound; a rear sound box fixed to a back of the speaker; and a changeable duct removably fixed to a front surface of the speaker and configured to pass through a front surface of the speaker and to be positioned in the rear sound box for inverting a phase of a particular frequency of sound among sound generated in a back surface of the speaker, and presenting the inverted sound, wherein the changeable duct comprises: a duct part of a tube form passed through the speaker and disposed in the rear sound box for making the rear sound box and the front of the speaker in communication; a flange part at a front end of the duct part for being caught at an edge surface of the speaker; and duct assembly holes formed in a front surface of the speaker to define an insertion position of the duct; and a duct holder disposed in the rear sound box for guiding the changeable duct inserted through the duct assembly hole in the front surface of the speaker, and supporting an outside surface of the changeable duct inserted through the duct assembly hole in the front surface of the speaker to prevent shaking of the changeable duct during operation of the speaker, wherein the duct holder is configured to guide and support ducts of different cross-sectional area and length such that the changeable duct can be removed and replaced with a changeable duct having a different cross-sectional area and length, and wherein the duct holder comprises a ridge fixed to an interior surface of the rear sound box for supporting the changeable duct.