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How does echolocation help bats locate insects?

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Meissner's corpuscle; mechanoreception — Mechanoreception In human skin, specialized nerve endings known as Meissner's corpuscles (or tactile corpuscles) are sensitive to touch. They are one of several different types of mechanoreceptors found in human skin.

Bats utilize echolocation to locate and track insects by emitting high-frequency sound pulses and interpreting the returning echoes. This process relies on specialized mechanoreception, where sound waves are converted into nerve impulses within the inner ear.12

To successfully capture prey, bats employ three distinct phases of pulse output:

Search: The bat emits pulses at a low rate to scan the environment.12
Approach: Upon detecting an insect, the bat increases its pulse rate and shortens pulse duration to focus on the target.12
Terminal: As the bat closes in, it emits a rapid "capture buzz" of extremely short pulses to finalize the interception.12

By analyzing the returning echoes, the bat’s nervous system extracts critical data:
* Distance: Determined by the timing of the echo.12
* Direction: Identified by comparing the relative intensities of frequencies received by each ear.1
* Velocity: Calculated via the Doppler shift, which measures changes in frequency caused by the relative motion of the bat and the insect.12
* Nature of target: The frequency spectrum of the echo provides information regarding the insect's size and texture.12