ear		blending pitches to produced sound
noise		variation in particular, in the amplitude or frequency of an electromagnetic wave
fundemental-tone		high-frequency ultra-sonic waves
modulation		sounds with more than 20,000hz
crest		shaped like a snail shell
over-tones		no pleasing quality
sound		sounds with frequencies lower than 20hz
trough		number of waves that pass a certain point in a given amount of time.
cochlea		change in sound or light that occurs wherever there is motion between the source and it's observer
wave-speed		higher frequencies and pitch
pitch		depends on the frequeny of the sound.
sonar		has three small bones the hammer the anvil and the stirrup
inner-ear		high point of a wave
music		low point of a wave
wave		determines the loudness or softness of a sound
intensity		the length from one crest/trough to another
wave-length		traveling disturbance that carries energy from one place to another.
speed-of-sound		frequency of a wave times wave length
ultra-sonic		produced by vibrations that travel through longitudinal waves.
amplitude		liquid filled portion of the ear; recieves vibrations from the middle ear
doppler-effect		the greatest distance from the resting position of a wave.
frequency		lowest frequency and pitch
infrasonic		material that the mechanical waves travel through.
medium		pleasing quality
timbre		determined by the tempurature, elasticity, and density of the medium.