Sound or noise?
Sound and noise are nouns. We can use them both as countable or uncountable nouns. Both refer to something which you can hear, but when a sound is unwanted or unpleasant, we call it a noise: There were lots of sounds in the forest. (countable)
It travels faster than the speed of sound. (uncountable)
She made a lot of noise. (uncountable)
There were some funny noises coming from the engine. (countable)
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