Fair point. And there is a difference also between one bat and a thousand bats clicking at the same time in a colony and overlapping the calls. Either the singi

Fair point. And there is a difference also between one bat and a thousand bats clicking at the same time in a colony and overlapping the calls. Either the singing is perfectly synchronised or those 0,2MHz would be higher. If the claimed effect is real then, hypothetically, the bigger the colony the less virus that we should find on it. This may happen or not. I don't have this data. Nobody studied it still from this point of view (If I'm not wrong).