Please send me a new fan. It's so loud it must be out of order. I have attached a video of the first launch. Update: The problem was that there was a clear plastic film left inside the fan housing. The fan blades hit this coating and made noise. Incidentally, the fan still does not work quietly. I chose to power it from the Pi's 3.3V GPIO pin instead of 5V. This reduces fan speed and reduces noise.
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