Sound 5 Flashcards
What is the ability of sound to cause vibrations called?
sound energy
What are the rapid back and forth movements that create sound?
vibrations
What is a surge of sound energy that travels through matter?
a sound wave
The number of times a sound source vibrates in one second is the __________.
frequency
What is the distance between one point on one wave to the same point on the next wave called?
wavelength
What is the process of making sound louder called?
amplification
The highness or lowness of a sound is its __________.
pitch
What is the height of a wave called?
amplitude
What is the unit that is used to measure the loudness of sound?
Decibel
Two sounds can have the same frequency and amplitude, but the sound quality can be very different depending on __________.
resonance
What is the pitch of sound determined by?
frequency
What is the loudness of sound determined by?
amplitude
How does sound make waves?
by pushing through solids, liquids, and gases
What does sound travel best through?
solids
What does sound travel least well through?
gases
When animals use an echolocation system based on sound waves to help them navigate and located food, this system is called __________.
sonar
What are the vibrations that cause string instruments to make sounds caused by?
plucking or stroking
What are the vibrations that cause percussion instruments to make sounds caused by?
striking or hitting
What are the vibrations that cause brass instruments and woodwinds to make sounds caused by?
blowing or forcing air into the air column
