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4 results for “sound-card”
Figure 5. Low-pass filter-EKG Through Sound-Card
<p>The low-pass filter, presented in figure 5, allows signals with frequencies up to 34 Hz (cutoff<br> frequency) to pass unaltered while it strongly attenuates those with frequencies exceeding the<br> cut-off frequency. It is an active filter, of the butterworth sallen-key type which contains one of the<br> four operational amplifiers of the TL084 integrated circuit.</p>
Figure 18. Adjusting the signal input through the microphone socket-EKG Through Sound-Card
<p>After that, the patient will be asked to wait for a few minutes, during which he will relax,<br> and we will adjust the amplitude of the input signal into the computer’s sound-card, through the<br> microphone socket. For this, we will use the program Sound Control from Start → Programs →<br> Accessories → Entertaiment → Sound Control (Figure 18).</p>
Figure 2. Patient protection in relation to the parasite signals of electric lines-EKG Through Sound-Card
<p>The recorder module applies the signal to the preamplifier’s non-inverted input and then<br> passes through the limiter which establishes the maximum left or right limits of the stylus, to avoid<br> breaking the recording tape. The power supply of the device contains mainly a convertor with an<br> output transformer and a reaction transformer powered either from a network through a downward<br> transformer followed by a rectifier and filter, or from an accumulator battery.<br> To comply with the rules of patient protection, the supply for the electrocardiograph’s<br> preamplifier is done floatingly according to the grounding null (Figure 2).<br> Figure 2.</p>
Figure 1. Bipolar limb derivations-EKG Through Sound-Card
<p>Since the human body is a conductive mass, an electrode attached to the arm is the electric<br> equivalent of a connection to the shoulder and an electrode attached to the foot is the equivalent of a<br> connection to the abdomen. Using this principle, we obtain the following three standard bipolar<br> limb derivations (Figure1):<br> • Derivation I: negative electrode to the right hand and positive electrode to the left hand<br> • Derivation II: positive electrode to the left foot, negative to the right hand<br> • Derivation III: positive electrode to the left foot, negative to the left hand.</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.