Sound Flashcards
What is the wavelength
The distance between two waves
What is the amplitude
The height of the wave
What is the frequency
The number of waves that pass a point per second
If a sound wave has a higher amplitude than another is it louder or quieter
Louder
What is volume measured in
Decibels (db)
What is pitch measured in
Hertz (Hz)
What part of the sound wave determines the volume
Amplitude
What determines the pitch
The frequency
If a sound wave has a higher frequency than another does it have a higher or lower pitch
Higher
What is the human hearing range
20-20,000 Hz
What is ultrasound
A sound higher than 20,000 Hz
What can ultrasound be used for
Scanning foetuses, scanning kidneys, cleaning jewellery
Why cant sound travel in space
Sound needs a medium to travel in but space is a vacuum
