Patent ID: 7136498
Filing Date: 2006-11-14
Classification: H04R

Abstract:
1. A loudspeaker, comprising: an acoustical enclosure that has an internal wall that divides the enclosure into first and second subchambers, the internal wall being provided with an opening; an electro-acoustical transducer having a vibratable speaker cone, the electro-acoustical transducer being mounted in the opening provided in the internal wall of the acoustical enclosure; an internal vent provided in the internal wall of the acoustical enclosure for pneumatically coupling the first and second subchambers; a first external vent provided in a wall of the first subchamber for pneumatically coupling the first subchamber to an exterior environment outside of the acoustical enclosure; a second external vent provided in a wall of the second subchamber for pneumatically coupling the second subchamber to the exterior environment; wherein a ratio of an acoustic mass of the internal vent to an acoustic mass of the second external vent is in a range of approximately 3/1 to 7/1.