Sound Final Test
Terms in this set (19)
What is the back and forth movement that produces sound?
High and low
What are two words that can be used to describe pitch?
What changes when the rate or speed of vibration increases?
The lowest sound
Will an instrument that is the biggest and has the longest/widest tubes produce the lowest or the highest sounds?
A megaphone, tube, or someone's ear
Name three things that can amplify sound
Gathering and directing
Objects can amplify sounds by ________________ and ____________ the sounds.
When you blow air into a bottle, it makes a sound because the air _______________.
What changes when the strength of vibration increases or decreases?
Make the string looser and/or longer
What two things can you change to make the pitch of a string lower?
The size of a bottle or string affects the ___________ of the sound it makes
Is a police siren very loud or soft?
A police siren's __________ changes so it can be heard over a long distance and to give a warning for people to get away.
Loud and soft
What are two words that could be used to describe volume?
Make the string tighter and/or shorter
What two things can you change to make the pitch of a string higher?
If a person hears a noise, the person's ear is the __________?
If a person hears a noise, the noise is the ___________?
Solid, liquid, & gas
What are the 3 mediums sound travels through?
It needs to travel long distances.
Why is a police siren so loud?
It needs to give a warning for people.
Why does a police siren change pitch?