No - it really is a roar - not loud buzzing. It is hard to describe even when you have heard it. I had something very similar when a gave a completely, unhappy enormous Q- colony a mated queen in a cage. It was like a roar at a football match when the home team scores!!
Hi, I've never heard this or anyone mentioning it. Do you mean just a really really loud buz which you can hear even when the roof is on?