Biosignal laboratory

Introduction

The biosignal laboratory of the research group includes up to date equipments for the acquisition of several biosignals. The laboratory facilities include a soundproof room equipped with complete audio-visual stimulus system, a control room including all the biosignal measurement and stimulus delivery equipments, and a Faraday shield. The biosignal laboratory can be used for carrying out complex audio-visual procedures as well as the basic cognitive paradigms. According to the specific research interests of the group, the laboratory is primarily designed for simulating work environment (e.g. by applying varying work load tests) and usability research.


View from the control room. The soundproof room is situated behind the window and the door on the left.

Biosignal measurement

The laboratory is equipped with modern biosignal instrumentation. These include a Compumedics NeuroScan SynAmps2 EEG amplifier with 70-channel (64 monopolar, 4 bipolar, and 2 high-level channels) headbox, National Instruments PXI NI-8176 data acquisition computer with real-time operating system and LabView graphical development environment. The biosignal measurements are performed in the soundproof room for eliminating ambient noise and enabling additional control over the sound environment. Furthermore, it is also possible to use the Faraday shield for minimizing electrical noise in the measurements if necessary.


The Neuroscan SynAmps2 amplifier, power supply, and 70-channel headbox (left) and the Euroshield Faraday shield (right).

Audio-visual stimulus environment

The soundproof room is designed for presenting audio-visual stimuli and simulating different sound environments in a highly controllable manner. The 5.1 surround sound environment is generated using 5 Genelec 1029A active monitor loudspeakers and a Genelec 7050P subwoofer. The equipment also includes Sennheiser HD600 headphones for playing possible additional stimuli and a microphone for communication purposes. Visual stimuli are currently presented using two Dell FP1703 17" TFT monitors, but a projector is also planned to be installed in the future for enhancing the delivery of visual stimuli.



Additional equipment

The control room is equipped with modern audio equipment and software. Audio equipment include RME Hammerfall DSP multiface soundcard, Behringer UB 1002 and UB 1204-PRO mixers, Behringer Ultragain Pro Mic 2200 microphone amplifier, and Behringer Powerplay Pro HA4600 headphone amplifier. Sound environments are generated and edited using Steinberg Nuendo 2.0 and Wavelab 4.0 software. The stimuli are delivered using Presentation® stimulus delivery software by Neurobehavioral Systems.


Copyright © Biomedical Signal Analysis Group 2013