3. Compression the graph showing a sine wave refers only to variations in pressure or compression, not to the actual displacement of air Sound waves Compression Compression Rarefaction Rarefaction Rarefaction
4.
5. Properties of sound Wavelength Refers to the physical distance between successive compressions and is thus dependant on the speed of sound in the medium divided by its frequency Amplitude (Intensity or loudness) Refers to the difference between maximum and minimum pressure Frequency (pitch) Refers to the number of peak-to-peak fluctuations in pressure that pass a particular point in space in one second Velocity Refers to the speed of travel of the sound wave. This varies between mediums and is also dependant on temperature (in air at 20°C it is 343 m/s)
![Sound ,[object Object],[object Object],[object Object],[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)