What effect does pressure have on the speed of sound in seawater?

The speed of sound in seawater is influenced significantly by pressure, and it actually increases as pressure increases. This effect is due to the fact that higher pressure within the water leads to greater density and compressibility, facilitating the transmission of sound waves.

In seawater, as pressure increases—often with increasing depth—the speed of sound also increases. This phenomenon is particularly important in underwater acoustics, where accurate navigation and communication depend on understanding sound propagation in the ocean.

While temperature and salinity also affect sound speed, the influence of pressure is notable because it directly correlates with changes in depth. Thus, acknowledging that pressure has a significant impact on the speed of sound is crucial for understanding acoustic behaviors in marine environments.