Energy & Sound Flashcards
How is sound made?
By vibrations in the air
What materials can sound travel through?
Solid, liquid and gases
Such as
Air, plastic, water, metal, wood etc
Describe sound energy
Energy that travels through substances in sound waves
What is an echo?
When the sound wave bounces off a surface and you hear the sound many times
What is a tuning fork?
A metal object with two ping arms. When you tap it, it produces a musical note
What is a sound wave?
The way sound travels through air
What is the ear canal?
A tube that connects the outer ear to the middle ear
What is the ear drum?
It is a thin piece skin inside your ear that vibrates when sound waves hit it
What is a nerve?
A group of long fibers that carries messages between your brain and a part of your body
Describe the process of hearing
- Sound waves travel through the air
- Your or ear (the part you see) catches the sound
- The sound waves travel along the ear canal
- The sound waves make your ear drum vibrate
- The vibrations travel through your tiny bones in the middle ear
- Then the vibrations travel through your cochlea (inner ear)
- A nerve take the message about sounds to your brain
- You hear the sound when the message reaches your brain
What is volume?
How loud or soft a sound is
What is pitch?
How high or low a sound is.
What kind of vibrations give a high pitch?
Quick vibrations
(High frequency)
How do you increase the volume a sound?
Putting in a lot of energy (eg hard blowing into a whistle covered to soft blowing)
On a stringed instrument, how is sound made higher pitch?
Tighten the strings.
Thinner strings.
Shorter strings
