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Volume from airflow

The AcqKnowledge and BSL PRO software has a sophisticated Integration feature that works both online and offline. The algorithm identifies the start or end of each breath and integrates the signal to provide a volume signal.

The algorithm has an option for subtracting the mean of the airflow signal, which helps to eliminate any drift or offset in the airflow transducer. The software removes the mean on a breath-by-breath basis and stabilizes the baseline before performing the integration. This feature will delay the display of the volume measurement because the integration can’t commence until the end of the breath. The software will allow you to enter a fixed delay interval so that you know the exact delay between the airflow and volume signals. By using a delay calculation channel, you can also delay the original airflow signal by the same time period. This will align both the volume signal and the airflow.

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Optimize Event-Related EDA

Electrodermal Activity (EDA) is an objective index for understanding emotional states. Researchers measure EDA to gain insights on psychological or physiological response, leading them down the path of scientific discovery. Because EDA is so important to research, BIOPAC has created tools to optimize event-related EDA analysis. Topics include: how to identify skin conductance responses, convert stim events from E-Prime SuperLab, Presentation, Vizard, etc., into AcqKnowledge events that can used for analysis, and score skin conductance responses using the AcqKnowledge automated EDA analysis tool.

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