Abstract: A learning device for people with damage to the cortical areas of the brain and minimal brain disfunction related to learning. It comprises an elongated housing one end of which is provided with a writing instrument and the other end of which is provided with an electromagnetic transducer which, when connected to a sound recording source, such as a cassette player, causes the elongated housing to vibrate mechanically in accordance with the frequency of sound signals. The device, when held against the skull while vibrating, transmits sound to both hemispheres of the brain so as to accomplish auditory perceptual training.

Abstract: An apparatus for intercranial transmission of a plurality of audio signals in which a pair of transducers are independently mounted on a headband for transmitting audio signals from a source to the cranium. The apparatus is comprised of two parallel wires having earmuffs attached to each end which fit over the ears to eliminate external stimuli. The transducer assemblies are adjustably mounted on the wire headband for sliding adjustment to different positions. The transducer assemblies each include separately oscillatable transducers which are insulated from external stimuli and from each other. A stereophonic plug is provided for connecting the independent transducer assembly to a stereophonic audio signal source.