Originally Posted by apple-q
How do you know that from a frequency response graph that only goes to 20kHz? Just because it hasn't been measured beyond 20k doesn't mean it´s not picking up anything beyond 20k.
No - but you can see that the frequency response is already starting to droop at 20kHz which implies that it's on the way down.
If it showed no sign of a droop at 20kHz I would say maybe.
But the manufacturers that advertise mics going up to 50 or 60 kHz have put in extensive design work to get them to go that high - I don't think a normal mic. that's only quoted up to 20kHz will go up there with any usable results - if it did, the manufacturer would say so.