Beyond Human Hearing

The video explores the range of sounds humans can hear, from 20 to 20,000 Hertz, and discusses sounds outside this range, such as ultrasonic and infrasonic frequencies. Ultrasonic frequencies, which are above human hearing, are used by animals for navigation and by humans in medical imaging and treatments. Infrasound, below human hearing, is detectable by some animals and can affect humans, causing symptoms like disorientation. The video concludes by noting that not hearing all vibrations is beneficial, as it prevents a noisy and disorienting environment.

What is the range of sound frequencies that humans can generally hear?

How do ultrasonic frequencies benefit animals?

In what ways is ultrasound utilized in medicine?

What effects can infrasonic sounds have on humans?

Why might it be beneficial that humans cannot hear all sounds around them?