Patent ID: 7035425
Filing Date: 2006-04-25
Classification: B60R,H04R

Abstract:
1. An electro-dynamic loudspeaker, comprising: a frame including a recessed portion; a plurality of vent holes in the recessed portion, the vent holes arranged in a plurality of columns, the vent holes in each column separated by a plurality of webs where a combined length of the vent holes in a longitudinal length of one of the plurality of columns and a combined length of the webs in a longitudinal length of the one of the plurality of columns defines a total length of the column of vent holes, where the combined length of the webs in a longitudinal length of the column is between about twenty and forty-five percent of the total length of the column of vent holes; a plurality of magnets disposed between the columns of vent holes; a diaphragm secured to the frame; and an electrical circuit disposed on a surface of the diaphragm.