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Sound waves can be expressed as a difference in pressure between their peak [[compression]]s and [[rarefaction]]s, or, more practically, by their loudness or ''[[sound pressure level]]''.
Sound waves can be expressed as a difference in pressure between their peak [[compression]]s and [[rarefaction]]s, or, more practically, by their loudness or ''[[sound pressure level]]''.
[[Category:Physics]]
[[Category:Physics]]
==References==
{{reflist}}
[[Category:Electrical Engineering]]
[[Category:Electricity]]
[[Category:Electronics]]
[[Category:Radio]]
[[Category:Amateur Radio]]
[[Category:Amateur Radio]]