Loudness, How loud you perceive a sound., Amplitude, The distance from the middle to the top or bottom of a wave., Frequency, The number of complete waves or vibrations produced in one second (measured in Hertz), Pitch, A property of sound determined by its frequency., Wavelength, The distance between two identical points on the wave., Cochlea, Snail shaped tube in the inner ear with the sensory cells that detect sound., Ear Drum, A membrane that transmits sound vibrations from the outer ear to the middle ear., Ear Canal, The tube that runs from the outer ear to the ear drum., Ultrasound, Sound of a frequency greater than 20,000Hz beyond the range of human hearing., Decibel, A commonly used unit of sound or loudness (dB)..

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