Best known application of echolocation by humans
Echolocation is a technique used by some animals to navigate and locate objects in their environment by emitting sound waves and listening for the echoes that bounce back. While humans do not naturally possess this ability, there is a well-known application of echolocation by blind individuals.

Navigation for the visually impaired
Blind individuals have been known to use echolocation as a way to navigate their surroundings. By making clicking noises with their mouth or using a cane to tap on surfaces, they are able to listen for the echoes that bounce back and interpret them to understand the location and distance of objects around them.

How it works
When a blind person emits a sound, it travels through the air and bounces off objects in their environment. The echoes of these sounds are then picked up by the person's ears, allowing them to create a mental map of their surroundings. By listening to the pitch, volume, and timing of the echoes, they can determine the size, shape, and location of objects.

Benefits
Echolocation can provide blind individuals with a greater sense of independence and freedom of movement. It allows them to navigate unfamiliar environments, avoid obstacles, and locate landmarks without relying solely on their other senses. With practice, some blind individuals have even been able to ride bikes, play sports, and engage in other activities that would typically require sight.