Accession Number : ADD005806

Title :   Biopotential Movement Artifact Inhibiting System.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Seeley,Robert L ; Flanigan,William F

Report Date : 02 Jan 1979

Pagination or Media Count : 8

Abstract : The broadband auditory thresholds of marine mammals are determined by an apparatus which compensates for the animals' movement artifact. A number of evoked responses to audio stimuli are average during discrete time intervals. This approach reduces the effects of potentials attributed to movements of the animal, for example, the opening and closing of the blow hole. A threshold detector circuit, a tape delay and related circuitry electronically cooperate to block potentials attributed to the movement artifact when the potentials exceed the likely magnitude of the evoked response. Optionally, an oscilloscope is used to provide a visual representation of the evoked response and the potentials are manually inhibited when the movement artifact masks or otherwise overrides the evoked response. (Author)

Descriptors :   *Patents, *Test equipment, *Auditory signals, Thresholds(Physiology), Aquatic animals, Cetacea, Detectors

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE