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Sound

Review of the nature and properties of sound

TermDefinition
sound a disturbance that travels through a medium as a longitudinal wave
sonar equipment equipment that detects reflected sound waves in water
diffraction When sound waves pass by a barrier or through a hole in a barrier, the waves spread out.
elasticity ability to bounce back after being stretched-mediums with high elasticity=high compression
solids and elasticity solid materials are usually more elastic than liquids and gases so waves travel more quickly
gases and elasticity gases are very inelastic and poor transmitters of sound
density how much material or mass is in an object over volume
density and sound In the same states of matter, sound travels slower in denser mediums.
temperature In a given medium, sound travels slower when it's cold (low temp.) and faster when it's warmer (high temp.).
intensity amount of energy a wave carries per second through a unit area
loudness describes what you hear; greater intensity= louder sound
decibels measurement of loudness
pitch how low or high a sound is; high frequency=high pitch
human ear has 3 main parts: outer ear, middle ear, inner ear
middle ear has the 3 smallest bones: Hammer, Anvil, Stirrup
outer ear acts as a funnel to direct the sound waves to the middle ear
ear drum vibrates sending the sound wave to the hammer, anvil and stirrup
cochlea in the inner ear, vibrates causing the tiny hairs to move the connected nerve cells to send signals to the brain
hearing loss can be caused by injury, infection or aging
Created by: jtirby