pe0fko wrote: > Ok I understand, I did put the pictures and the .wav file on my webside.
I've been meaning to hook up an ultrasonic detector to the input of my SDR-IQ and do something similar. However, I then made a bat monitor instead (I then bought a commercially made unit as well) and intended to record the sounds on a digital recorder. However, due to the cold weather and some family issues, I didn't have enough time to go out and listen for bats much this year. I am monitoring the 12kHz output from my TS-2000X through the SDR-IQ and the display doesn't have the same vertical lines as evident on the soundcard sample, so I guess the SDR-IQ could reasonably easily be used to monitor bats. At these frequencies, you need to be careful near noisy sources of low frequencies, such as fluorescent lights and even running water or jangling keys, as they are all emitters of low frequency signals of course. In fact, they can be a useful way to see if your ultrasonic detector is working before you take it out into the field. Dave (G0DJA)
