Patent ID: 7317806

Claim:
An earpiece, comprising: a sound delivery member, wherein an end portion of said sound delivery member is configured to accept a removable eartip; an enclosure coupled to said sound delivery member; means for receiving a signal from an external source; a first driver disposed within said enclosure and electrically coupled to said receiving means, said first driver having a first acoustic output; a first sound delivery tube of a first length interposed between said first driver and said end portion of said sound delivery member, wherein at least a portion of said first sound delivery tube is integrated within said sound delivery member, wherein said first acoustic output is acoustically coupled to an acoustic input of said first sound delivery tube, and wherein an acoustic output of said first sound delivery tube is acoustically coupled to said end portion of said sound delivery member; a second driver disposed within said enclosure and electrically coupled to said receiving means, said second driver having a second acoustic output; a second sound delivery tube of a second length interposed between said second driver and said end portion of said sound delivery member, wherein at least a portion of said second sound delivery tube is integrated within said sound delivery member, wherein said first and second sound delivery tubes are discrete, wherein said second acoustic output is acoustically coupled to an acoustic input of said second sound delivery tube, and wherein an acoustic output of said second sound delivery tube is acoustically coupled to said end portion of said sound delivery member; and means for compensating for a phase shift between said first and second drivers, wherein said phase shift is specific to at least one predetermined frequency, and wherein said compensating means further comprises setting at least one of said first and second lengths of said first and second sound delivery tubes to a phase shift compensating length.