When we yell, our vocal cords bash together extra hard, causing them to get sore and swollen. The swelling can develop over a few hours so you might notice hoarseness more the next day.
The sound comes from our lungs and our voice box, which is at the front of the throat. Here's how it works.
Researchers say it's time to finally discard a decades-old theory about the origins of human language – and revise the date when human ancestors likely were able to make certain speech noises.
Considering language from a biological perspective led researchers to the idea that new food processing technologies affected neolithic human beings' jaws – and allowed new language sounds to emerge.
You can log in to your smartphone by talking to it. Current security systems don't protect enough against imitators. The best way to ensure voice authentication is secure is to start with the sound.
For bilingual children, the constant switching between languages is like a frequent exercise for the ears and the brain.
Here's what one man from around 3,300BC actually sounded like.
What effect does music have on the developing brains of babies who haven't even learnt to talk?