From the Sold Archive – Brüel & Kjaer Head and Torso Simulator, Type 4128C

It's been been a pleasure to offer some truly interesting items over the years. As is the case with this listing from The Sold Archive. 

The Brüel & Kjaer, Type 4128C Head and Torso Simulator simulates the acoustic properties of a human head and torso by using a manikin with built-in ear and mouth simulators. A lot of things can be tested, like telephone handsets, headsets, audio conference devices, microphones, headphones, hearing aids, and hearing protectors.