[Blood of Tyrants]

Correct. The average “silencer” quiets the dound down by about 30-35 dB.

[Tailback]

Bingo. It’s more of a “pewww” sound. Especially noticeable on a snub nose revolver.

/sarc

[Red in Blue PA]

Correct. The average “silencer” quiets the dound down by about 30-35 dB.

However, because decibels are logarithmic, every approx. 3 decibel increase is about twice as loud, so saying a silencer "only" cuts the decibel level by 30 is misleading to those who do not know this scale.