An acoustic signal is a type of sound wave that carries information through vibrations in a medium, such as air, water, or solids. These signals can be produced by various sources, including musical instruments, human speech, or natural phenomena like thunder. The characteristics of acoustic signals, such as frequency and amplitude, determine their pitch and loudness. Acoustic signals are essential in many fields, including telecommunications, where they are used in devices like microphones and speakers. They also play a crucial role in marine biology, as many aquatic animals, such as whales and dolphins, communicate using sound waves to navigate and find food.