Physics: Sound
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Describe the production of sound by vibrating sources.
Sound is produced by vibrating waves
State the approximate human range of audible frequencies.
20 - 20,000Hz
Describe transmission of sound in air in terms of compressions and rarefactions
Sound travels in air through a series of compressions and rarefactions that make up longitudinal wavelengths.
Demonstrate understanding that a medium is needed to transmit sound waves
Sound needs a medium to travel
Describe an experiment to determine the speed of sound in air.
Stand at a cliff face and make a short, sharp sound. Record the time from when you perform the sound and when you hear the sound return back to you. Divide this time by two.
State the order of magnitude of the speed of sound in air, liquids and solids.
Solids, Liquids, Air
Relate the loudness and pitch of sound waves to amplitude and frequency.
Loudness is controlled by the amplitude. Pitch is controlled by the frequency.
Describe how the reflection of sound may produce an echo.
The sound comes back from the reflective material and may have been loud enough to produce a sound coming back idk this is confusing.