Article | REF: BR2030 V1

Hydroacoustics and ship noise

Author: Gérard FOURNIER

Publication date: April 10, 2009

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1. Differences between air and water

From an acoustic point of view, the fact that the equations are the same should not mask the major differences between water and air. Water has a density around a thousand times greater than air, and a compressibility twenty times lower. In fact, the fluctuation in acoustic density ρ is linked to acoustic pressure p by the relationship :

where c is the celerity of sound.

In air, the reference pressure...

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Differences between air and water