ultrasonic

["stocklyo" stocklyo]

helloo to all , nice to join you in the group

can someone help me in finding a microphone or any equipment for 
recording ultrasonic wave sound , a sound above the humen ear range , 
i found these bats detector and even a microphone of 140khz but the 
problem they are too expensive , and i'm looking for more than 200khz 
frequency , my point is to record sounds in the field that we dont 
hear not specificly of animals but generaly

and thanx