Disagreeable sounds can be called dissonance. You know it's dissonance if you have the strong desire to cover your ears with your hands.

Racket, noise, dissonance — all can describe sounds that are not pleasant. While some musicians purposely add a little dissonance into their melodies to create an unexpected sound, others, like someone who just started drum lessons, creates dissonance by accident. Dissonance can also be a conflict between people or opinions, like the dissonance you feel when you want to do something but your parents say "no."

Definitions of dissonance
  1. noun
    disagreeable sounds
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    an agreeable sound property
    discord, discordance
    a harsh mixture of sounds
    disharmony, inharmoniousness
    a lack of harmony
    loud confusing disagreeable sounds
    type of:
    sound property
    an attribute of sound
  2. noun
    the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience
    synonyms: noise, racket
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    type of:
    auditory sensation, sound
    the subjective sensation of hearing something
  3. noun
    a conflict of people's opinions or actions or characters
    synonyms: disagreement, dissension, misunderstanding
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    accord, agreement
    harmony of people's opinions or actions or characters
    lack of unity (usually resulting from dissension)
    a serious disagreement between two groups of people (typically producing tension or hostility)
    type of:
    a state of opposition between persons or ideas or interests
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