What is Sound?
form of energy that travels as waves
What is sound?
reflected sound waves
What is an echo?
Faster than the speed of sound for that medium
What is supersonic?
unit used to measure the intensity or loudness of a sound
What is decibel?
How high or low a sound is
What is pitch?
rapid back and forth movement
What is vibration?
If the energy of the sound is not reflected, the sound was ________.
What is absorbed?
One hertz is equal to _____ wave per second
What is one?
amount of energy in a sound wave
What is intensity?
sound above 20,000 Hz frequency
What is ultrasonic?
Caused by vibrations
During the ruler lab, the longer the ruler hanging off the desk caused what kind of pitch.
What is lower?
loud noise caused by breaking the sound barrier
What is sonic boom?
Loudness in a sound wave determines the ______ of a wave
What is amplitude?
sound below 20 Hz frequency
What is infrasonic?
Sound waves formed by what two things
What are compressions and rarefactions?
During the ruler lab, the shorter ruler hanging off the desk caused a what kind of pitch?
What is higher?
Travels faster than sound
What is light?
The more intensity a sound wave has the ________ the sound
What is louder?
Unit to measure frequency
What is Hertz?
Sounds needs a __________ to travel
What is a medium?
Sound waves cannot be produced in a _________.
What is a vacuum?
340 m/s
What is the speed of sound?
Humans can hear between
What is 20 and 20,000?
apparent change in the frequency of waves
What is the Doppler effect?