Fact is that guns with silencers are still really loud with silencers, correct. Not like in the movies… with normal ammunition. In that case, the sonic boom is what you hear. But with subsonic ammunition and a slightly larger silencer it is really very quiet and can sound like in the video or in movies almost. It’s hard to find on youtube because very few people want to shoot with such weak cartridges + with a silencer additionally, but if you’re really interested you can find it. If I remember after work I can look for another demonstration and post it here. if you are interested.
https://youtube.com/shorts/_1GRjRH9tKA? https://youtu.be/9c36ujvK9bs? basically just the mechanical parts that are audible. still not like the movies but pretty close. In person i felt like it’s actually less loud than in these vids depending on the gun.