Waves
A water wave is an example of what type of wave?
Transverse Waves
What is the maximum amount of hertz a human can hear?
20,000Hz
What part of your ear do sound waves hit?
Ear drum
When a sound wave reflects off a surface, it is called?
An echo
Finish the calculation:
Speed = -------------
__________
--------------
Speed = Distance
_______
Time
What are waves caused by?
Vibrations or Oscillations
What can we wear that will protect our ears from loud noises?
Ear defenders/ Headphones
When you get older you start to lose the ability to hear sounds of a high _______
Frequency/ Pitch
How do bats use ultrasound?
To know where things are/ To help them move around.
What direction do particles vibrate in a Transverse wave?
Up and Down
The larger the amplitude the ______ the sound
Louder
What part of the ear turns the vibrations into electrical signals?
Cochlea
When an ultrasound is send out it then ________ off the surface and back
Reflects
What direction do particles vibrate in a Longitudinal wave?
Backwards and forwards.
The higher the frequency, the _________ the pitch.
Higher
The front of a microphone (diaphragm) where vibrations hit, is the same as what part of our ear?
Ear drum
When a ship uses ultrasound to detect the seabed, they call this?
Sonar
What is the name of the top part and bottom part of a Transverse wave?
Peak/crest and Trough
If something is high pitched then that means there are more ________ happening
Vibrations/ waves
The small bones in your ear that amplify vibrations is called?
Ossicles
If a room has a lot of echos then can join together and cause a ______
Reverberation