College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

Exercise 54

Dolphins and bats determine the location of their prey using echolocation (see Conceptual Question). If it takes 15 ms for a bat to receive the ultrasonic sound wave reflected off a mosquito, how far is the mosquito from the bat Take the speed of sound as 345 m/s.
Conceptional Question
Dolphins and bats determine the location of their prey by emitting ultrasonic sound waves. Which wave phenomenon is involved