Due to battery operation of the wireless transmitter and close proximity to the subject’s body, common-mode rejection ratio is extremely high, considerably in excess of any typical wired EEG recording system. Accordingly, notch filters to remove mains interference (50 or 60 Hz) are typically not required.
Collect data from two scalp sites with either unipolar (referential) or bipolar montages.
Using the equation generator in AcqKnowledge, a bipolar measurement can be extracted between two unipolar measurements referenced to a common point, such as the mastoid or earlobe. Use the AcqKnowledge software to automatically filter the raw EEG signals – wide bandwidth EEG data can be filtered to lower values to accommodate closer inspection of specific EEG frequencies, such as Delta, Theta, Alpha, Beta and Gamma wave activity and to provide a full frequency analysis of the data; the software will also remove any EOG artifact in the signals.
Biopotential amplifier/transmitter signal to noise ratio is very high (in excess of 70 dB), as the noise floor of the amplifier/transmission system is only 0.2 µV rms (bandwidth of 0.10 Hz to 100 Hz).
The module set has a fixed gain of 10,000. The largest EEG signal which can be measured is 2 mV P-P, the smallest signal which can be detected is less than 0.2 µV rms.
Interference with other recording modules or systems is greatly minimized because the transmitter is completely battery operated and operates totally independently of any other recording grounds or power sources. The recording transmitter is also extremely safe to use, because there is no physical connection to supply mains.
The transmitter attaches to the subject’s head or neck via stretchy Velcro strap, a stretch-mesh BioNomadix Shirt (see accessories), or Coban™ self-adhesive wrap (WRAP1). The exterior transmitter body dimensions (W x H x D) are approximately 6 cm x 4 cm x 2 cm and it weighs approximately 54 grams.
The transmitter’s battery can provide power for up to 72 hours of continuous operation.
The new BioNomadix series of wireless, wearable physiology monitoring devices for life science research are available for a wide range of signals, including ECG, EEG, EOG, EMG, EGG, Respiration, Pulse, Temperature, Electrodermal Activity, Impedance Cardiography, Accelerometry, and Gyro. BioNomadix are typically dual-channel units, offering either two of the same signal or a combination of signals.
BioNomadix noninvasively record high-quality, full-bandwidth data while comfortably allowing subjects to move freely in natural indoor environments. Each BioNomadix device consists of two parts, a transmitter that is worn by the subject to amplify and send the physiological data, and a receiver module. BioNomadix transmitters use digital transmission and short leads or transducers placed close to the signal source to provide excellent signal quality. BioNomadix are configured for specific signal types, so you don’t have to adjust settings on the hardware or software for high quality data.
Multiple BioNomadix can be used to provide the optimum signal combination for a research study requiring biopotential or transducer signals.
BioNomadix accessory items include transducers, electrode leads, and a custom, pocketed stretch-mesh shirt to comfortably hold multiple devices in place. The shirt has zippers placed for easy access to electrode sites and is available from extra small to extra large.
Developed and manufactured by BIOPAC Systems Inc., a leader in life science data acquisition and analysis, the new BioNomadix series delivers all the benefits of a wireless solution with the signal quality & integrity of a wired system. BioNomadix provides a cost-efficient option for uncompromised wireless physiological subject monitoring.