Essentials
High frequency = many ________ per second.
What are vibrations?
This is why sound can't be heard on the moon?
What is no medium/matter/air to travel through?
A whistle has a ______ pitch
What is high pitch?
As you move from LEFT to RIGHT on a piano keyboard the notes go from _____ to ____ pitch.
What is LOW to HIGH?
Volume or loudness is measured in these units.
What are decibels (dB)?
Sound travels slowest through which kind of material___________
What are gases?
How sounds travel from one location to another.
What are sound waves?
Compared to a flute, a tuba has a ___ level of pitch.
What is Low?
Sound needs _____ to travel.
What is a medium?
Sounds with many vibrations per second have ___________ than sounds with fewer vibrations.
What is higher pitch?
These type of materials absorb sound the best.
What are soft materials?
Volume is the ________
loudness of a sound
An echo is created through sound...
What is reflecting or bouncing back?
Frequency is measured in these units.
What are Hertz (also, vibrations per second)?
The three types of matter sound travels through
Solid, Liquid, Gas
In our speed of sound measurement sound could ______ , _____, or ________.
What are echo (reflect), absorb, disperse?
When we talk, sound travels through this.
Air
As you go from RIGHT to LEFT on the piano, the pitch gets __________.
What is LOWER?
True/False: Sound always travels at the same speed.
What is False?
Sound is created through....
vibrations
All matter is made of small _______
What are particles (or atoms or molecules)?
The fewer the vibrations, the ____ pitch
Lower
This is the reason echos only occur with a hard surfaces (not soft surfaces).
What is soft surfaces absorb sound and hard surfaces reflect sound?