Patent ID: 6144738
Filing Date: 2000-11-07
Classification: H04M,H04R

Abstract:
A handset comprising a sealed-unit receiver and a loudspeaker, first means for providing sound from substantially only the sealed unit receiver to the ear of a user when the ear of the user is sealed to the handset, said first means comprising at least one port coupling sound from the receiver within a region of a surface of the handset intended to be in sealing contact with the ear of a user, and second means for providing sound from both the sealed unit receiver and from said loudspeaker to the ear of the user when the ear of the user is not sealed to the handset, said second means comprising at least one further port coupling sound from the loudspeaker to the ear of the user outside of said region, and in which the receiver and loudspeaker are sealed to walls of an acoustic cavity of the handset, both receiver and loudspeaker being back-ported to said acoustic cavity, said at least one further port communicates with said acoustic cavity.