Abstract: An educational system for visualizing sound by a student in a laboratory. The system includes a speaker powered by an audio amplifier. A function generator or a microphone controls the amplitude and frequency of pressure waves originating from the speaker. A model of the ear canal is suspended over the speaker, the model having a plastic pipe with two open ends and a membrane stretched taut over one of the open ends with constant tension. A mirror is affixed to the membrane, creating a mass-loaded membrane. A laser pointer emits light directed toward the mirror. A screen receives a light reflection pattern created by the light reflected from the mirror, with the model ear canal, speaker, membrane, and mirror placed equidistant between the screen and the laser pointer. The system is adapted to demonstrate hearing sensitivity to a deaf or hearing-impaired person in an educational setting.

Abstract: A control system and method for controlling a tracking device based on the position of a celestial object, such as the sun, the moon, or any heavenly body. The control system includes a tracking device configured to follow movement of the celestial object based on astronomical data for the celestial object, motor for moving the tracking device, and a computer for controlling the motor. The computer is configured to obtain the astronomical data; calculate an amount of movement for the tracking device; and reposition the tracking device in order to track the movement of the celestial object. The tracking device may include solar applications, cameras, antennae, satellite dishes, or any device envisioned to track celestial objects.

Abstract: An educational system for visualizing sound by a student in a laboratory. The system includes a speaker powered by an audio amplifier. A function generator or a microphone controls the amplitude and frequency of pressure waves originating from the speaker. A model of the ear canal is suspended over the speaker, the model having a plastic pipe with two open ends and a membrane stretched taut over one of the open ends with constant tension. A mirror is affixed to the membrane, creating a mass-loaded membrane. A laser pointer emits light directed toward the mirror. A screen receives a light reflection pattern created by the light reflected from the minor, with the model ear canal, speaker, membrane, and mirror placed equidistant between the screen and the laser pointer. The system is adapted to demonstrate hearing sensitivity to a deaf or hearing-impaired person in an educational setting.