Kapnal Loga

— I was referring to your shock waves of air called 'surge' or 'water hammer'. — I mean, in some industries you can buy special scotch that does not have a crackle. Therefore, I am a little confused as to how this can be explained by an air strike. Paper fibers are soaked in water, which makes them more flexible and weaker. When you tear wet paper, the fibers tear more easily, are more inert and don't move as fast, so there is less air disturbance. This makes the process of tearing paper less audible and silent. Right? I don't quite understand, is the sound created by the sudden movement pushing the air away or is the sound created by the air pushing under the void?

I also thought about the vacuum shock, but if you consider duct tape: it has a kind of vacuum under the tape and kind of vacuum shock too. BUT: there is a silent tape, without cracking, it works due to the special laying of the adhesive layer. It is viscous and there is no tearing noise. So what is the cause of the sound, is it the breaking of the bonds, the vacuum or something together?

I realize it's about fast motion, but then why doesn't a flying bullet squeal like crazy? That's fast motion too, what's the difference? The sudden movement of the tape, I read somewhere that the wave along the tape can move at supersonic speeds, but how does this all relate and cause this sound specifically?

Hello, I had a hiccup in explaining how sound is produced when materials break down. For example, A) we are tearing paper, B) we're unwinding duct tape. There is a break in the adhesion bonds. The breakage results in a sudden release of energy, which is converted to kinetic energy in some way, creating sound. How does sound occur? What's vibrating in there to cause it? I'm interested in physical part of production of sound in these processes.