Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Sound A disturbance that travels through a medium as a longitudinal wave.
Elasticity The ability of a material to bounce back after being disturbed.
Intensity The amount of energy a sound wave carries per second through a unit area.
Pitch How high or low a sound is.
Interference When two or more sound waves interact.
Acoustics How well sounds can be heard in a particular room.
Ear Canal Where sound waves enter the ear.
Eardrum A tightly stretched membrane at the end of the ear canal.
Cochlea A liquid-filled cavity in the inner ear.
Sonar A system of detecting reflected sound waves.
Echolocation The use of sound waves by bats and dolphins to locate food and other objects.
Ultrasound Sound waves with frequencies above 20,000 Hz.
Infrasound Sound waves with frequencies below the normal range of human hearing.
Echo A reflected sound wave.
Sonogram A picture of the inside of the human body produced by ultrasound.
Doppler Effect The change in frequency of a wave produced by a moving source.
Density The amount of mass there is in a given amount of space.
Created by: sikkwl