Depends on where you are. Often its shrimp. Could be fish feeding on coral. If you are in California in the spring you might be hearing Garabaldi guarding his nest. Sound travels much further under water. What you hear in Tropical and sub tropical waters is fish,shrimp and other forms of sea creatures. In colder fresh water, you do not hear the same volume of sounds .
Could be shellfish, fish, lobsters, rocks (moved by waves)
Rustling.
The crackling sound you hear when diving on coral reefs is often caused by snapping shrimp, which are small, shrimp-like crustaceans that make loud snapping noises as a form of communication. These sounds can also be made by other marine organisms such as fish, snapping clams, or crustaceans rubbing their body parts together.
the batterys are probrably crackling, check your wiring
The cracking noise is the tip of the whip breaking the sound barrier
Crack is in a rocklike form and it smoked. The name crack comes from the crackling sound it makes when it is burned
A bonfire typically makes a crackling sound as the wood burns and releases gases. This crackling noise occurs as the flames heat up pockets of air trapped within or among the wood.
Sonar, which stands for "sound navigation and ranging," is the method used to find objects underwater by emitting sound waves and measuring the time it takes for them to bounce back. This allows for the detection and location of underwater objects like shipwrecks, submarines, and marine life.
The crackling sound when taking off clothes is caused by static electricity buildup on the clothing fibers. As the clothing rubs against itself or your body while being removed, electrons are transferred, creating a static charge that discharges as a crackling sound.
उलझ or उलझन - In Hindi, the crackling sound of geese can be described as "उलझ" or "उलझन".
To make it crackle.
That crackling sound is your hard drive being read, and it can be fixed by replacing your hard drive with an expensive Solid State Drive.