Acoustics
4 questions tagged Acoustics — spanning every one of the seven Ws.
Why Does Helium Change Your Voice?
Helium is much less dense than air, so sound travels about 2.7 times faster through it, raising the resonant frequencies of your vocal tract and making your voice sound higher-pitched.
What Is Sonoluminescence?
Sonoluminescence is the mysterious phenomenon where sound waves in liquid cause tiny bubbles to collapse so violently that they emit brief flashes of light, reaching temperatures potentially exceeding 20,000 Kelvin.
How do dolphins use echolocation to find fish?
Dolphins send out clicks and listen for echoes that bounce back from objects. The returning sound helps them judge distance, size, and shape.
Why do some waterfalls roar while others sound quiet?
The sound depends on the height, volume, shape, and landing surface of the falling water, which control how much turbulence and spray it creates.