Software Bat Toolkit
These tools are for fellow bat detector designers and other ultrasonic hardware hackers. With these it is possible to test ultrasonic capabilities of sound cards. Once you know you have a sound card capable of recording and/or playing ultra sound these tools can then be used for tesing other hardware.
Software heterodyne bat detector
If you have a soundcard capable of recording ultra sound this applicaton can emulate a heterodyne bat detector. With it you can convert ultra sonic sounds in the range 15kHz to 95kHz (with a 192k sound card) into audible tones.
High speed ultrasound audio recorder
With the addition of some inexpensive home built hardware it is possible to use a PC running this software into a high speed ultrasonic recorder.