> 16 kHz ➢ Speed of sound ~ 340 m/s ➢ Needs a medium to travel in (air, water… not vacuum) ➢ Gets dampened a lot through air loses its power, effect rises with the frequency low frequencies for long distances and high frequencies for short distances ➢ Humans: 20 Hz – 20 kHz ➢ Dogs: 15 Hz – 50 kHz ➢ Bats: > 100 kHz Sound source Object