What is the difference between audible, infrasonic, and ultrasonic sounds?
Audible sound: Frequency range 20 Hz to 20,000 Hz (heard by humans). Infrasonic sound: Frequency less than 20 Hz (e.g., earthquake vibrations). Ultrasonic sound: Frequency greater than 20,000 Hz (e.g., used in medical imaging). Related Questions: Why does sound require a medium to travel? What is the effect of humidity on the speed of sound? … Read more