In my humble opinion, this would be the worst of the growing season this year. I woke at 3am and a quick drive around the neighbourhood confirmed significant activity with helicopters, frost fans and return stack burners.
This would be the loudest that I can remember a frost event and I presume this is due to the increase in numbers of fans. The cumulative effect is certainly significant.
Interestingly, The cumulative effect has a positive spin of partially masking the 5 minute oscillation of frost fan noise and instead the noise is steadier (Louder, but steadier). The thumps from the blades are still significant, but the longer duty cycle oscillations are less noticeable because of the overall increase in noise.
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