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  5. G24-K013: Soundproof

G24-K013: Soundproof

This lab is operated by the Pollmann Lab.

For questions, problems, or scheduling, contact Mikaella Sarrou.

Overview

The lab has one soundproof lab for eye tracking experiments. It is also equipped with a KVM matrix, which allows for nearly complete flexibility over which computer (EEG recorder, Eye Tracker, Presentation Machine, or researcher supplied Laptop) displays to any screen — and routes both audio and USB.

Software

The Presentation Computer runs Debian Jessie (8) with Matlab (2012b), PsychoPy, and Psychtoolbox installed. It has been configured to match the timing/configuration requirements of both PsychoPy and Psychtoolbox.

Eye Tracker

SR Research EyeLink 1000

TODO: discuss camera speed, mount, etc

Communication with the eye tracker is done via the yellow Ethernet cable. The Presentation computer is already setup. If you need to communicate using your laptop, use the following settings to configure your NIC:

  • Address: 100.1.1.2
  • Netmask: 255.255.255.0
  • Gateway: 100.1.1.1

Speakers

A portable, USB-rechargable, battery operated speaker is available.

KVM Matrix

The Gefen EXT-DVIKVM-444DL KVM Matrix (datasheet; manual) is the key piece that makes it possible to use all the computers, screens, USB peripherals, and audio devices — in all the needed combinations. It is also a DVI amplifier, enabling reliable signal for the longer cable runs into the EEG cabin.

The matrix can connect to 4 computers (1x DVI; 1x USB; 1x 3.5mm audio) and 4 control stations (1x screen; 1x keyboard; 1x speakers/headphones).

Any control station can connect to any computer — and even multiple control stations can be connected to the same computer.

To demonstrate how this is useful, the following is a common experiment workflow:

Eye Tracker is displayed inside the cabin:
to run the calibration
Presentation Machine (or Researcher's Laptop) is displayed inside the cabin:
to display the actual experiment

Each control station has a Perixx keyboard (Periboard 409) that has 2 additional USB ports. One is used for a mouse; the other can be used by other USB response devices (joystick, etc). These are all routed, via the Matrix, to the appropriate computer.

Monitors

The colored dots on the monitors match the Gefen matrix remote.

Presentation Monitor (Green/Input #1)
iiyama G-MASTER GB2488HSU-B2
Eye Tracking Monitor (Brown/Input #2)
Requires a 4:3 ratio monitor
In-Cabin Monitor (Red/Input #4)
iiyama ProLite GB2488HSU-B1

The In-Cabin Monitor is wall mounted with an adjustable arm and swivel. This allows the monitor height and depth to be adjusted for experiments which require different visual-fields.

A laser distance meter and level is available (on the shelf near the doorway) to verify that the screen is positioned correctly.

TODO: explain refresh rate vs resolution and matrix

Peripherals

The following peripherals are available:

  • 8-button, USB Cedrus RB-830 Response Pad
  • 5-button, 25-pin serial Psychology Software Tools 200A Response Box
  • 6-button, 25-pin serial Cedrus RB-600 Response Box