Are These The World's Most Annoying Sounds?

By Meera Dolasia on October 15, 2012

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What is the most unpleasant sounds to the human ear? That, was the big scientific mystery that researchers at the Welcome Trust Center for Neuroimaging at UCL and Newcastle University in England, wished to solve. So, they recruited a group of 13 people and subjected them to 74 different noises that we encounter in our everyday lives.

In order to make the results as objective and unbiased as possible, they determined the reactions, not by the listeners' expressions but by measuring their brain activity with an MRI scanner. What they discovered was that while sounds are normally processed in the brain's auditory cortex, unpleasant sounds - identified as those with a frequency of between 2,000 and 5,000 Hz - seem to activate the amygdala neurons that aid in processing emotions, making us more sensitive to that particular noise, which is why we consider it irritating or pleasing depending on what it is.

The study which was led by Dr. Sukbiner Kuman was conducted to better understand how the human brain reacts to different sound decimals, which will in turn aid scientists to better understand medical conditions like migraines or autism, where the sufferers are very sensitive to noise.

So what are the sounds that make our hair stand? Here, are the top five as revealed by the scientists in a report published in the Journal of Science earlier this month. What will probably come as a surprise (or maybe not), is that two of them are noises most of you encounter on a regular basis.


In case you are wondering, the sound that the 13 people found most pleasant was that of bubbling water! Did you find the noises as annoying? If not, be sure to let us know what noises irritate you the most, by adding your comments below.


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  • whats 9+10 21Wednesday, October 22, 2014 at 3:47 pm
    i hate those sounds
    • coolnicki477
      coolnicki477Monday, October 13, 2014 at 6:36 pm
      the sound of nails on a blackboard.. *shudder* imagine cats doing it
      • ROBLOXMonday, October 13, 2014 at 10:40 am
        I just hate it when people scratch metal it makes me shudder and feel cold kind of.
        • spinnypeeps
          spinnypeepsSunday, October 12, 2014 at 8:09 pm
          I HATE the sound of writing with pencils with no lead. I flinch from the thought of it.
          • SoundsSaturday, October 11, 2014 at 4:38 pm
            • SassmasterSaturday, October 11, 2014 at 4:00 pm
              That was mortifying
              • star_girl
                star_girlSaturday, October 11, 2014 at 2:53 pm
                I do not think the sounds were annoying.
                • spottedhorse120
                  spottedhorse120Saturday, October 11, 2014 at 10:59 am
                  Umm.... Is it bad none of these things annoy me? (Without the recording I get the chills when nails scratch the blackboard and it hurts too)
                  • streetboy987
                    streetboy987Saturday, October 11, 2014 at 12:51 pm
                    i hate these sounds!
                  • p0lly1
                    p0lly1Saturday, October 11, 2014 at 10:44 am
                    none were really anoyying!!!
                    • kkar13
                      kkar13Saturday, October 11, 2014 at 9:51 am
                      nails on the blackboard...



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