▲Think when you break and that high-pitch sound penetrates your eardrums like a sharp knife.

▲Yet another power tool on the list. Though the sound of this one is, apparently, even worse than the sound of a drill.

▲We've all heard this one at some point. It seems to be even more annoying when somebody else is using it, right?

▲This might have something to do with how high-pitched a female scream can be.

▲The desperate cry of a baby triggers all sorts of emotional responses in us. Parents, and anyone who's ever been exposed to the sound of a crying baby, can relate.

▲Using a ruler against a bottle will produce a very unpleasant sound.

▲For those who had these in classrooms, you know how annoying chalk on a chalkboard can sound.

▲And here is the most unpleasant sound to the human ear: running a knife on a bottle. You can listen to it here.

▲There is just something about rubbing metal on glass that produces such an unpleasant sound.

▲Through MRI scans, researchers have found that activity in the amygdala (the part of the brain responsible for emotions) increased when people were exposed to certain sounds.

▲Next are the 10 most unpleasant sounds you can listen to. Ready?

▲The study found that the high-frequency range, between 2,000 and 5,000 Hz, was the most unpleasant for the human ear.

▲On the flip side of the coin, there are sounds that are quite pleasant to the ear. Though further research is needed, here are some of the most satisfying sounds you can listen to.

▲A cat purring sounds very warm and sweet, and we humans love it.

▲When you land and the seat belt sign turns off and you hear a very satisfying 'ding' sound: freedom!

▲You know that crisp sound when you first walk on a fresh layer of snow. It's great!

▲There is something pleasurable about the distinctive sound a ball makes when it falls into the hole.

▲This sound is often associated with positive things, and there is a good reason for it. Most of us like to listen to birds singing.

▲We've been gathering around fire since the dawn of time. There is something comforting about burning wood crackling.

▲Whether it's hitting the roof while you're in bed, or splashing against the window while you sip on a hot drink, rain sounds great.

▲This one is surprisingly pleasant. Perhaps it's the sound frequencies, but humans like the sound of thunder.

▲Not many sounds come close to the one made by people clapping. It's a very satisfying sound, especially if they're applauding you.

▲Water is life and the sound of it flowing can be very relaxing indeed.

▲Contrary to the sound of a crying baby, this one can be very soothing.

▲The study found that this activity of the amygdala then increases our perception of unpleasant sounds when compared with sounds we usually find soothing.

▲Find out how sound frequencies can heal you and save the planet here.

▲And here's the classic nails on a chalkboard. If this sound doesn't send shivers down your spine, then try and do it yourself.

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Some sounds can be really annoying. Think of a car alarm going off or the sound of two pieces of polystyrene being rubbed together. Pretty unpleasant, right? But there are worse ones out there—a lot worse.

While fingernails on a chalkboard will likely send shivers down your spine, there are a lot of other really annoying sounds that our brains respond to negatively. A study published in the Journal of Neuroscience looked at these and uncovered some amazing facts about which sounds we find most unpleasant and why.

Then on the other side of the spectrum there are sounds very pleasant to the human ear. These can be soothing, comforting, relaxing, and give us other pleasurable sensations.

Intrigued? Browse through this gallery and discover the most unpleasant and satisfying sounds in the world.

The most unpleasant (and satisfying) sounds, revealed

Fingernails on a chalkboard? Not the worst sound out there!

18/07/24 por StarsInsider

LIFESTYLE Science

Then on the other side of the spectrum there are sounds very pleasant to the human ear. These can be soothing, comforting, relaxing, and give us other pleasurable sensations.

Intrigued? Browse through this gallery and discover the most unpleasant and satisfying sounds in the world.