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  • Patent number: 5625684
    Abstract: System for use by a caller and a recipient of a telephone call for suppressing environmental noise in the vicinity of a telephone comprising a telephone handset forming a part of the telephone. The telephone handset has a human voice sensor for picking up human sounds generally in one direction, and creating a first electrical signal. A speaker capable of producing substantially directional human voice sounds is provided. A second sound sensor is carried by the handset and has sound pick-up capabilities from a direction which is generally opposite said one direction for picking up external environmental noise in the vicinity of the handset and producing a second electrical signal having a frequency and amplitude.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: April 29, 1997
    Assignee: Local Silence, Inc.
    Inventors: Anthony F. Matouk, Dieter Enzmann, Ahmet Karakasoglu