Abstract: The present specification describes methods and systems for tracking vision performance, using various techniques such as and not limited to electrooculography. A modular device is integrated with frames of eyeglasses that can be worn by a user. The device incorporates one or more biosensors such as EOG sensors. EOG recording may be used to estimate eyelid and eye motion, and eye gaze direction. The modular device may be fitted into new eyewear or retrofitted into existing eyewear for tracking eyes of the wearer. Embodiments of the present specification provide systems and methods to enable seamless integration of eye tracking into everyday life to maximize productivity and performance.

Abstract: The present disclosure provides a communication device for a hearing protection equipment which includes at least one earmuff, at least one loudspeaker and an audio input member, the device includes: a housing; a first mounting assembly rotatably arranged on the housing; a second mounting assembly arranged on the housing, the first mounting assembly and the second mounting assembly are releasably connected to two ends of the earmuff respectively; a microphone configured for capturing an audio; a radio transceiver configured for wirelessly transmitting the audio captured by the microphone to user and wirelessly receiving a wireless signal containing an audio from the user; and an audio output member communicated with the audio input member and configured for transmitting the wireless signal containing the audio to the at least one loudspeaker. The present disclosure further provides a system for connecting the communication device to the hearing protection equipment.