Not sure about 30D...since I am not a canon user, but9 B: i8 ?4 B7 v' s3 c
9 p& j" w x+ P Z/ h2 ~For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... 8 n2 u- Z& x0 j* Z- @$ V9 @+ p: C2 P! z. D( R
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.