Bruel & Kjaer Type 4128 Head And Torso Simulator (HATS) 1990’s - Factory

This Bruel & Kjaer HATS Model 4128 is a head and torso simulator. It has capabilities for in-ear microphones, built-in mouth speaker and mouth microphone holder for tele-headset use. It is used to set up room frequency equalization and optimum stereophonic listener frequency response using a pink noise source. Perfect for recording studio and home theater optimization, as well as automobile driver and aircraft pilot hands-free audio research. It has a built-in mouth speaker (red and black wires) and left/right ear microphone connection. It also comes with a factory sound absorbing vest accessory shown in the sealed clear plastic bag. Small wheeled wooden dolly is for pictures only and is not included. More technical information can be found here: Gracey.co.uk