Properties of Sound
Sound is made by ______
Vibrations
What is volume?
How loud or soft a sound is
What can cause noise-induced hearing loss?
Too many loud noises for too much time
Why can't sound be heard on the moon?
no medium/matter to travel through
Name a category of instruments, based. on how they make sound.
Percussion, wind, string
Sound is best absorbed by what kind of material?
soft
What is a vibration?
moving back and forth
How can you protect your hearing?
Lower volume of music, wear earplugs, don't listen to loud sounds for extended times, etc
When we talk, sound travels through this.
Air
A tuba has _________ pitch.
Low
Sound is best reflected by what kind of material?
Hard
What is sound?
a form of energy that travels in waves through matter
Name an example of noise pollution
Highways, fireworks, construction, etc.
An echo is created through sound...
reflecting
The lower the frequency, the _____ the pitch
lower
What is an echo?
The sound waves bouncing off of materials and coming back to your ear
What is pitch?
How high or low a sound is
Why is it important to take care of your hearing?
Once it is gone, you cannot get it back
What does frequency (how many sound waves) measure?
Pitch
High frequency = ________ pitch
high
Sound travels fastest through _____________
Solids
What is energy?
The ability to make things work
Describe how ears hear.
The outer ear collects vibrations and sends them to the ear drum. The vibrations move bones in the ear and move the vibrations to the cochlea which passes messages to the brain.
Name another form of energy
Wind, solar, light, heat, etc.
What do we use to measure sound?
decibels (dB)