Chapter 16 quiz Flashcards
What is sound?
Vibrations that travel through air or another medium and can be heard.
What type of wave is a sound wave?
Longitudinal wave.
Can sound travel through space? Why or why not?
No, because space has no particles for sound to travel through.
What causes sound waves?
Vibrations.
In which medium does sound travel fastest?
Solids.
How does temperature affect the speed of sound in air?
Sound travels faster in warmer air.
What does the outer ear do?
Collects sound waves and channels them into the ear canal.
What does the eardrum do?
Vibrates when sound waves hit it.
What is the cochlea?
A fluid-filled part of the inner ear that turns vibrations into signals for the brain.
What is amplitude?
The maximum distance particles move from their rest position (related to loudness).
What unit is used to measure sound intensity?
Decibels (dB).
What is pitch?
How high or low a sound is, based on its frequency.
What is the Doppler Effect?
A change in pitch caused by a moving sound source.
What is constructive interference?
When sound waves overlap to make a louder sound.
What is destructive interference?
When sound waves cancel each other out.
What gives a musical instrument its unique sound?
Its combination of a fundamental tone and overtones.
What is echolocation?
Using reflected sound waves to locate objects (used by animals and sonar).
What is ultrasound used for?
Medical imaging and other applications using high-frequency sound.
