Acoustomyographic Signals Recorded on the Human Head—A New Channel for Obtaining Physiological Information

Abstract

We studied the origin of pulsed acoustic signals, which were first discovered in our previous study using temporal leads in subjects at rest. We simultaneously recorded acoustic, electroencephalographic, and electromyographic signals in subjects at rest. It was found that the acoustic signals correlated with the electromyographic signals when acoustic receivers were placed on the temples and electromyographic electrodes were located on the corresponding temporal muscles. Correlations of the acoustic and electromyographic signals were also observed when acoustic receivers and electromyographic electrodes were placed on the biceps. These correlations indicate the common nature of the observed acoustic and electromyographic signals and allow them to be classified as spontaneous acoustomyographic signals observed in subjects at rest. Therefore, similarly to the electromyographic signals, the pulsed acoustomyographic signals can be used for the purposes of medical diagnostics.