The amplitude and frequency of a sound wave can be examined using a microphone and oscilloscope. By measuring the speed of sound we can apply the wave equation to determine its wavelength.
What do we need to measure to calculate the speed of sound in air?
The time it takes a sound to travel a measured distance
The time it takes a sound to travel an unknown distance
The time it takes lightning to strike
What can be used to represent sound waves on a screen?
Which property of a wave does the pitch of a sound refer to?
What is the frequency range of human hearing?
Less than \(20 Hz\)
\(20\, Hz\) to \(20\, 000\, Hz\)
Greater than \(20\, 000\, Hz\)
What is noise pollution?
Background noise that has a high volume
Background noise that has a high pitch
Background noise that has a low volume
What unit is sound level measured in?
Long-term exposure to sound above what sound level is likely to cause hearing damage?
What is the sound level of a pneumatic drill 5 metres away?
What is ultrasound?
A sound with a frequency higher than human hearing
A very loud sound
A sound with a frequency lower than human hearing.
Which of the following is a possible use of ultrasound in medicine?
Breaking up kidney stones
Taking an image of broken bones