An unpleasant sound that has irregular pattern and no definite pitch. It is normally annoying?
Answer: Noise
Both noise and musical sound (pleasant sound) are mixtures of sounds of different frequencies, but musical sound frequencies are discrete and rational, whereas noise frequencies are continuous and irregular. So noise is defined as an unpleasant sound produced by irregular wave patterns.
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An unpleasant sound that has irregular pattern and no definite pitch. It is normally annoying?
Answer: Noise
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