Patent ID: 6282287
Filing Date: 2001-08-28
Classification: H04M,H04R

Abstract:
A communication earpiece, comprising:an earpiece housing having a chamber therein, wherein a plurality of sound outlet meshes is provided on a front surface of said earpiece housing;a loudspeaker, which is mounted in said chamber of said earpiece housing, having a low intensive impulse noise output end and a high intensive impulse noise output end; anda resonant piece, which is mounted and encircled around said loudspeaker, having two or more peripheral sides thereof said resonant piece affixed to an inner surface of said earpiece housing so as to mount said loudspeaker in said chamber and divide said chamber into a front chamber and a rear chamber and render said lower intensive impulse noise output end of said loudspeaker facing to said front chamber and said high intensive impulse noise output end facing said rear chamber, therefore said low intensive impulse noise output end is closer to said sound outlet meshes of said earpiece housing than said high intensive impulse noise output end, wherein a cross section of said resonant piece is different to a cross section of said chamber of said earpiece housing so as to provide at least a passage gap between said inner surface of said earpiece housing and said resonant piece that enables a high intensive and pressure sound wave emitted from said high impulse noise output end into said rear chamber to transmit through said passage gaps into said front chamber and meet a low intensive and pressure sound wave emitted from said low intensive impulse noise output end in said front chamber, thereby said high and low intensive and pressure sound waves interfere with each other in said front chamber wherein a frequency response increases when said high and low intensive and pressure sound waves are in phase and said frequency response decreases when said high and low intensive and pressure sound waves are out of phase.