Główne pojęcia
The EAVI ExG board is an open-source, wireless, microcontroller-based hardware design for the acquisition and processing of bioelectrical signals, including muscle electromyogram (EMG) and brain electroencephalogram (EEG).
Streszczenie
The EAVI ExG board is a hybrid physiological sensing platform that combines muscle electromyogram (EMG) and brain electroencephalogram (EEG) signals in a single, unified signal processing chain. The hardware design features a specialized biosignal acquisition chip (Texas Instruments ADS129x) mated with a general-purpose microcontroller (STMicroelectronics STM32F427) for high-quality signal digitization and real-time digital signal processing.
The key highlights of the EAVI ExG board include:
- Multichannel EMG and single-channel EEG acquisition with high resolution (24-bit) and low noise floor (< 5μV RMS).
- Flexible signal processing capabilities, including sample rate conversion, high-pass/low-pass filtering, notch filtering, and data conversion.
- Wireless data transmission via Bluetooth Low Energy (BLE) or USB, enabling integration with a wide range of host devices and music systems.
- Integration with the OWL Microcontroller Framework, which provides an abstraction layer between digital signal processing and firmware development, allowing for fast prototyping, development, and testing cycles.
- Open-source hardware design, published on GitHub, enabling customization and adoption by the broader community.
The EAVI ExG board has been used in various applications, including user studies with neuro-diverse musicians and trained instrumentalists, as well as in live performances, demonstrating its versatility and potential for physiological computing and digital musical instrument (DMI) development.
Statystyki
The EAVI ExG board captures ExG data at a sample rate of 16 kHz and a resolution of 20-bits.
The system has a noise floor of less than 5μV RMS.
The board can transmit up to 16 channels of data via Bluetooth Low Energy (BLE) at 125 Hz with 14-bit resolution.
Cytaty
"The hardware/firmware system interfaces with host software carrying out feature extraction and signal processing."
"The demo will show multichannel EMG, and single channel EEG. We call this hybridization 'ExG'."
"The EAVI board captures ExG data at a sample rate of 16 kHz and a resolution of 20-bits."