Not sure about 30D...since I am not a canon user, but! y, M% U& T4 X% Q
8 m8 y" O% P. i* `For most of the Cameras, this sound is simulated, and it can be turned off in setting manu... , j$ F1 Y( ]3 `6 `7 r/ Z/ j5 E6 ?$ p. ?
The shutter and reflective lense sound seldom as loud as what you hear. If yes, they would be damaged very soon.