Advertisement Upgrade to remove ads


is a disturbance that travels through a medium as a longitudinal wave

Sound Waves

reflect off objects, diffract through narrow openings and around barriers, and interfere each other


sound waves may reflect when they hit a surface

speed of sound

depends on the elasticity, density, and temperature of the medium the sound travels through


is the ability of a material to bounce back after being disturbed


is how much matter, or mass, there is in given amount of space, or volume.


describes your perception of the energy of a sound


depends on two factors: the amount of enery it takes to make the sound and the distance from the source of the sound


amount of energy a sound wave carries per second through a unit area

decibel (dB)

loudness of different sounds is compared using a unit


is a description of how high or low the sound seems to a person


depends on the frequency of the sound wave


sound waves with frequencies above the normal human range of hearing


sounds with frequencies below the human range of hearing


where vocal cords are located

Doppler effect

change in frequency of a wave as its source moves relation to an observer


is a set of notes that combines in patterns that are pleasing

sound quality of music

results from blending a fundamental tone with its overtones. Renonance also plays a role in the sound quality

fundamental tone

lowest natural frequency of an object


object's higher natural frequencies


is the study of how sound interact with each and the environment


is used the design of concert halls to control reverberation and interference


which the echos of sound are heard after the sound source stops producing sound wave

ear canal

it collects sound waves and directs them into a narrow region


is small, tighty stretched, dreamlike membrane


is a fluid-filled cavity shaped like a snail shell

inner ear

converts the sound waves into form your brain can understand

middle ear

transmits the waves inward

outer ear

funnels sound waves

injury,infection,exposure to loud sounds, and aging

some causes of hearing loss


is the use of reflected waves to determine distances or to locate objects


helps navigate and find food

bats + dolphins

animals that use echolocation


a system that uses reflected sound waves to detect distances and locate objects underwater


an image formed by an ultrasound waves

sonar + ultrasound imaging

Are used to observe things that cannot be seen directly

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording