EEG With audio output

Details EEG With audio output EEG With audio output

1981-09-14

1984-06-19

Howell, Kyle L.

Surgery

Truss

Pad

A61B 504

Patent

active

044548869

ABSTRACT:
A method is described for generating sounds (which are of a musical nature) that are related to the state of a person's brain, which is useful in anesthesiology and other applications. A brain wave signal, which may be derived from an electroencephalograph, is converted in real time from an analog to a digital signal, and stored in a memory. An epoch delineator detects points along the signal which can define segments of the signal. The signals in the memory are read out in segments, with the segment signals repeatedly read out N number of times and at a rate N times faster than the input rate to the memory, to generate a train of signals that are high frequency replicas of the segment. Thus, the multiple replicas of the segment are all read out during the same time period required to originally store the segment, and after each segment is read out the next segment to be stored is repeatedly read out. In one system, a segment ends when the filtered brainwave signal crosses a zero voltage level in a positive-going direction.

REFERENCES:
patent: 3110770 (1963-11-01), Howell
patent: 3753433 (1973-08-01), Bakerich et al.
patent: 3882850 (1975-05-01), Bailin et al.
patent: 3890957 (1975-06-01), Freeman
patent: 4020291 (1977-04-01), Kitamura et al.

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