Content about “
sound wave

Article

Cosmic sound

Taking apart the CMB picture using the maths of sound.
Article
Drums

What makes an object into a musical instrument?

Many things make a noise when you hit them, but not many are commonly used to play music — why is that? Jim Woodhouse looks at harmonic and not so harmonic frequencies and at how percussion instruments are tuned.
News story

Stellar heartbeats

Astronomers have for the first time listened to the heartbeat of a star other than our own Sun.