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Sound waves

What is Sound and How do we Hear it?

Learn how sound travels in waves and how it is measured in this backgrounder.

 Sound waves and sound-producing devices. Image © jop_pop,

Sound vs. Noise

What is the difference between sound and noise? How do they affect your hearing? And is noise always a bad thing?

 Inside the Destiny Laboratory Module on board the International Space Station

Noise on Earth and on the International Space Station

This backgrounder explains what noise is, how it is measured, and how it affects our hearing, wellness and more.