Patent ID: 7162041
Filing Date: 2007-01-09
Classification: H04B,H04M,H04R

Abstract:
1. A noise canceling microphone comprising: a housing; at least one transducer located in the housing, the at least one transducer for converting sound energy received into electrical signals; a front sound pathway to a front sound opening in the at least one transducer, wherein the front sound pathway comprises a front port passage with a first diameter and a first length and a front entry canal with a second diameter and a second length; a rear sound pathway to a rear sound opening in the at least one transducer; and the front and rear sound pathways being located on opposite sides of the housing and being displaced 180 degrees off a vertical axis, wherein the front and rear sound pathways are located entirely within the housing, and wherein the front port passage and the front entry canal are located at an angle relative to each other that is greater than 0° and smaller than 180°.