The device I got was an Infiltec Infra 20. It will record directly record infrasound from 20 hz down to .05 hz. The primary intended purpose of the device is earthquake detection as is the associated software. It is not portable in that it requires being hooked up to a computer to record data and has a large detection array. The primary output is a DB9 cable but the maker supplies a DB9 serial to USB adapter. All together the device with cables and adapters costs close to $300. Better than $6600 but not portable. Additionally the detection array is basically upside down metal pie plates 3 or 4 (not furnished) connected to a common hose which is plugged into the side of the device which is the size of a half loaf of bread. The device detects pressure waves in the atmosphere or those produced by passing earthquake wave. The multiple sensors are necessary to null out wind pressure differences or it would be worthless if there was any wind. Interestingly in addition to earthquakes such a device is used by the nuclear test ban treaty observers which have stations in several places on the globe. Similar devices can detect an atmospheric test 1000s of miles away. The software leaves a lot to desire and since it is intended for earthquake recording, it does not lend itself to BF detection very well. If you are familiar with the helicorder of an earthquake detector that is the form of the recorded data.
Since it is not portable, all deployment I have planned is in camping situations. It will readily detect infrasound and BF footsteps because it will detect my own footsteps that are inaudible but produce mini earthquakes when you walk. The problem is that BF rarely uses infrasound, from what I can determine, and the primary intent of that use is fear and intimidation. So unless BF has other uses for infrasound, and I do have some evidence of that, you need to provoke a BF to zap you for the recorder to have anything to record. I have recorded single pulses of infrasound that I assume were produced by a BF that I knew was nearby, so I do have data that suggest BF use infrasound for some other purpose than intimidation. My present theory is that they send out pulses of infrasound that should be detectable by BF some distances away. They probably feel them in their large chest cavity more than hear them but I suppose that is possible if you have a large head and corresponding large ear drums to hear them directly. This could be a chest produced equivalent of a tree knock but one that is inaudible to humans. They consist of a single low frequency pressure wave, that is repeated every 15 or 20 seconds for a couple of minutes then stop.
In a camping situation the device can act as a distant early warning system, and detect BF footsteps that are inaudible. Perhaps that is the best use to date unless I can provoke a zapping encounter. My research area has gone cold so I have not had any field time with the device when I know BF are around. I have had it deployed when there are distant thunderstorms in the area that were inaudible to my ears but the device picked them up quite readily. I did not know what it was until the thunderstorms got close enough to hear with my ears. Additionally you have to check earthquake reports in your area or something interesting could be an earthquake you are not aware of. So you need to note the time when anything interesting happens and check it with the USGS reports in the area.
So while I do have the equipment, and it does have potential, lack of portability limits it's use.
Rather than call blasting supposed bigfoot calls, I think some researchers have had better luck playing music. One reported that a certain minor key produce the most response. Classical seems to be better received than Pop music. Maybe we should go visit a dairy farm and see what the cows prefer when they are milked. They seem to have preferences too.
The sound thing has potential but proving infrasound was produced by a BF is daunting. You would have to have simultaneous video and infra recording to even begin to prove that BF was the source. I don't know how you would arrange that unless you could get a BF to chase you into your camp with a video recorder and infrasound recorder running. If you get one that angry you might not survive the experiment to know that it was successful. I don't think I want to play that game.