Abstract: Sleep apnea screening and/or detection apparatus for use by a patient breathing through the nose and/or mouth and producing an air flow into and out of the lungs of the patient and creating audible sounds. It is comprised of a first microphone positioned in the vicinity of the patient's nose and mouth and out of contact therewith to pick up audible sounds created by breathing of the patient and providing a first electrical analog signal. A second microphone is provided which is positioned near the patient for picking up ambient noise in the vicinity of the patient and providing a second electrical analog signal, an active noise controller is provided for combining the first and second electrical analog signals to provide a third electrical signal for generating a fourth electrical signal providing a waveform which is closely correlated with the air flow of the patient.

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.