Why does scratching dry skin sound louder than scratching moisturized skin?

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Why does scratching dry skin sound louder than scratching moisturized skin?

In: Biology
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Sound is created by friction. But it is also absorbed by matter. Softer matter absorb sound while harder one reverb it. An example of it are church and theaters.

Church are usually solid material and it produce a load of echo. Sound reverberate everywhere.

Theaters often put sheets of cloth around the room (at least I know they do where I live) to avoid reverberation and stay true to the sound of the movie.

Well, among other things, dry skin is harder. Sound reverberate on it. So part of the sound that would be absorbed by the skin is instead reverberated toward you.

Another thing is that moisturized skin move alongside other things touching it. Meaning it produce minimal friction. lower friction lead to lower sound.