What is sound?
Sound is moving energy that travels as a pattern of changing pressure. Sound is not a thing it is a property of medium it travels through. sound is often described as vibrations. In this blog I'm going to be using soundwaves to describe sound.
Sound is difficult to visualise. This is why the diagram helps us see the size of the wave which shows us the volume of the sound it also lets us look into the frequency of the vibration which is the pitch of sound. he waveshape is also another key part to the diagram as this represents different instrument.
"This image show us compression and rarefaction"
Compression and Rarefaction
- As the source expands it pushes the surrounding air molecules away causing them to "bunch" together and the air pressure to increase.
- As the source contracts the surrounding air molecules spreads out to fill the increasing space, causing a decrease in air pressure.
"This image represents the cycle"
Cycles
- When a source has expanded and contracted once it is said to have cycled. This is a single vibration.
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