Chapter 23: Sound Flashcards
What type of waves are sound waves?
Longitudinal
What can sound waves do?
They can be reflected, refracted and diffracted.
What is the frequency range for human hearing?
20Hz - 20,000Hz
Design an experiment to measure the speed of sound in air.
Measure the distance between two places, have a sound mass in one place, as soon as you see the sound has been made start a stop watch, as soon as you hear the sound made, stop the stopwatch. Then calculate the speed using speed = distance/time
What does the pitch of a sound depend on?
The frequency of the vibration of the source
What does the loudness of a sound depend on?
The amplitude of the vibration
Are there any conditions for sound?
Sound requires a medium to transfer energy.
Describe the relationship between density and speed of sound.
The more dense a medium is, the faster the speed of sound.
Explain the relationship between density and speed of sound.
The particles are closer together, and so pass on the vibrations more quickly.
How can an oscilloscope and microscope be used to display a sound wave?
A microphone detects sound waves, it can feed this information into an oscilloscope, which will display it as a wave.
What is the relationship between time period and frequency?
Time period = 1/frequency
