What is echolocation?
Sound waves emitted by animals, such as bats, that bounce off objects and tell the animal their location.
What is frequency?
The number of times an object vibrates per second.
How does changing the medium of a sound change its amplitude?
The denser the medium, the less the amplitude and vice versa.
What is the Doppler Effect?
A change in frequency due to moving toward or away from a sound wave.
A classmate says that higher pitch music notes are irritating because they vibrate in your ear faster. Which part of that statement is fact and which is opinion?
Irritating= opinion; vibration speed= fact.
What is pitch?
How high or low a sound is.
How can we make sounds louder?
Using more energy (increasing the density of the particles in the compressions and decreasing it in the rarefactions).
What is "sound navigation and ranging" commonly called? How does it work?
Sonar; sound wave emission + timing device to determine object locations.
What is amplitude?
The height of sound waves. (or: The air density within compressions and rarefactions vs outside of them)
What is volume and how is it measured?
The loudness of sound; decibels.