When you feel me, you do not want others to hear me for I make unbidden loud noises telling others of my arrival. What am I?

The sensation described, making unbidden loud noises that tell others of its arrival, refers to the rumbling or growling sounds that often emanate from our abdomen. These noises are medically known as borborygmi, and they are a perfectly normal, albeit sometimes embarrassing, part of the digestive process. They are particularly noticeable when the stomach is empty, acting as a clear signal that the body requires nourishment.

These sounds are caused by muscular contractions, called peristalsis, which occur throughout the gastrointestinal tract, including the stomach and intestines. Even when there's no food to digest, these wave-like movements continue, mixing and pushing along liquids, digestive juices, and gas. When the stomach is full, the food acts as a muffler, dampening these sounds, but in an empty gut, the noises become much more audible.

The feeling itself is a fundamental biological drive, prompting us to consume food to provide our bodies with energy. Hormones play a crucial role in this process. For instance, ghrelin, often called the "hunger hormone," is primarily produced in the stomach and signals the brain when it's time to eat. When ghrelin levels rise, it stimulates appetite and can also increase the muscular movements that lead to those distinctive rumbling sounds. This intricate system ensures that our bodies receive the fuel they need to function.