- A hub for connecting optical and mechanical response switches that the subject uses to signal during a test. This unit communicates with the NI PXI-6220 which feeds the signals to REATPro.
- Software controlled switching of the VIacoustics High-Power Attenuator (L-pad) lets the user decide when the attenuator should be in use via our REATPro Software.
- Intercom control. The talk back microphone is muted while the talk forward microphone is in use to eliminate the possibility of feedback.