Pitch		The science of sound and it's interactions.
Ultrasonic		Part of the ear that contains hundreds of nerve cells attached nerve fibers.
Infrasonic		Liquid portion of the ear that receives vibrations from the middle ear.
Doppler Effect		Blending of pitches to produce sound quality.
Intensity		Property of sound which depends on frequency.
Acoustics		Note produced at the lowest frequency that a standing wave occurs.
Sound Quality		Part of the human ear that funnels sound waves into the ear.
Timbre		Sound above the range of human hearing.
Fundamental Tone		Blending of pitches to produce sound; timbre.
Overtone		Sound below the range of human hearing.
Sonar		Change in sound or light that occurs whenever there is motion between the source and it's observer.
Outer Ear		The amount of energy carried by a wave indicated by the amplitude of the wave.
Middle Ear		Part of the ear that receives vibrations from the ear drum and contains the hammer, anvil, and stirrup.
Inner Ear		Stretched membrane in the ear that vibrates at the same frequency as the sound waves that enter the ear.
Cochlea		Technique of using sound waves to measure distance, sound navigation, and ranging.
Ear Drum		Tone produced at frequencies higher than the fundamental at which a standing wave occurs.