AC mode indicates that a high-pass (HP) filter has been applied to the signal that you are recording. An HP filter removes the low-frequency components of a signal. The most common AC mode settings on BIOPAC amplifiers are 0.5 Hz HP and 0.05 Hz HP. In AC mode, the signal is centered around zero.
AC mode is useful in studying changes in the signal. AC mode is not appropriate for recording absolute measures or for detecting the baseline level of the signal.
StimTracker Duo. StimTracker Quad MARK. SYNC. AUDIT. StimTracker Duo and Quad autonomously detect the onset of events to avoid operating system delays. The Quad adds direct TTL output, support for vocal response onset (voice key), more light sensors, and the option to install a Raspberry Pi board. Onset of Auditory Stimuli – Pass the audio via StimTracker, set […]
Science Night at Adams Elementary (Santa Barbara, CA) encourages students to discover, play, explore and learn about the importance of science and engineering in daily life. BIOPAC set up a BioNomadix Wireless Smart Center to allow students to record their heart rate. Electrodes were placed on students and leads were connected to a wireless transmitter that sent data […]
Recent developments regarding electric stimulation and mental processing have lead to interesting developments in psychophysiology and physiological sciences. The following studies look at developments in how we potentially care for and understand solutions to issues with mental health, as well as new ways to monitor electrical stimulus on participants. The ventromedial prefrontal cortex (vmPFC) is […]