To directly compare improvements there is a 'Baseline' mode. The Bare camera is plotted on the X axis, and the Y axis compares noise levels.

What can be seen by the following is that the MONSTRO FANS transmit 6dB more noise through the TOP and FRONT of the camera when the FANs are at 20% - compared with when a the Noise Isolating HOOD is used.

06 - Base Baseline

+) The sound was measured with a Rode shotgun in front and to the right of the camera facing forward in both cases.
+) Camera was about 5ft from the ground / standard UK ceiling height of 8ft.