One of the main reasons we’re more likely to flinch because of a loud or sudden sound is because we don’t need to be facing it. If something suddenly happens visually, you need to be facing it with your eyes open. But a sudden sound could come from any direction and you’ll hear it, and your ears don’t close. Even when you’re sleeping, you’re still listening and sounds are likely to alert you to danger long before any visual info. The hair cells in your ear that send sounds to your brain have been working constantly since before you were born, and some will continue until you die. So basically, look after your ears!
(Source: hearing scientist)
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