Water hitting the surface can actually produce sound, but the sound may not be easily noticeable or audible in certain cases. There are a few reasons why water hitting the surface might not generate a significant sound:
Sound absorption: Water is a relatively dense medium compared to air, and it has a higher capacity to absorb sound waves. When water droplets hit the surface, some of the sound energy gets absorbed by the water itself, leading to a reduction in the sound level.
Sound transmission: Water is a good conductor of sound, and when water droplets hit the surface, the sound energy can be transmitted through the water. However, in open bodies of water, such as a calm lake or the ocean, the sound can easily dissipate over a large area, making it less perceptible.
Sound masking: In natural environments with other ambient sounds, such as wind, waves, or other water movements, the sound produced by water droplets hitting the surface may be masked or overshadowed by these background noises. The impact sound of individual water droplets might not be distinguishable amidst the overall soundscape.
Size and velocity of droplets: The size and velocity of water droplets hitting the surface also play a role. If the droplets are small or have low velocity, they may not generate sufficient energy to create audible sound waves. Larger droplets or droplets with higher velocities can produce more noticeable sounds upon impact.
It's important to note that in certain scenarios, such as when water hits a hard surface or a container, the sound of impact can be more pronounced due to the interaction between the water and the surface, which can create vibrations and reverberations that generate audible sound waves.