Not sure about 30D...since I am not a canon user, but : ^& I. r4 W- N* b! |" h7 m& q" }( }' G, Z; Z s+ W
For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... & J1 ~( a1 j6 [! Q: ~% Y/ }, g( A' f/ a) V& j" s. M
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.