Well since my other guesses are all taken and you have to be the first to say it, I'll take a wild stab that it'll be a receiver that is based on the 7100 amplifier and the 950 preamp.
for a not so serious guess... its a device that is worn on the body almost like the electronic dog collars; it sends an electric shock anytime someone thinks they hear hiss.
(Edit: Almost what kugumby said, but this one starts when the person hears the hissing)
[This message has been edited by JHoff80 (edited October 07, 2002).]