Or Rick has taken a similar product and added some special sauce.
I’m suspecting it’s something used in the aero space industry or perhaps the military. You can just imagine the extreme environment of space where temperatures swing by hundreds, if not thousands of degrees. A number of people must have been working hard and for many years at not letting the electrical connections fail.
Audio is just not nearly important to warrant research of this kind. One of the venders probably has a friend in at JPL or where tax money is spent hand over fist on research.