Apparatus for testing hearing aids, namely, hearing aid test chambers; apparatus for teaching and training the hearing disabled and deaf, namely, visible speech units, loudspeakers and room amplifiers, and parts and accessories for all the aforesaid goods; software for controlling apparatus for testing hearing aids, hearing aid test chambers, amplifiers, visible speech units and for displaying information therefrom

[ AUDITORY AMPLIFIERS, APPARATUS FOR VISUAL AND TACTILE INDICATION OF PITCH AND VISUAL INDICATION OF SOUNDS FOR TRAINING IN ARTICULATION, APPARATUS FOR TRANSPOSING SPEECH FREQUENCIES INTO LOW FREQUENCY RANGE, APPARATUS FOR TACTILE SPEECH TRANSMISSION BY VIBRATORS CONNECTED TO AN ELECTRONIC FREQUENCY FILTER SYSTEM, VISIBLE SPEECH DISPLAYS FOR ARTICULATION TRAINING OF THE TOTALLY DEAF, ] AUDIOMETER FOR INDICATION OF HEARING LOSS, [ SPEECH UNIT FOR SPEECH AUDIOMETRY ] AND AUDIOMETER EARPHONES