Ergonomic Evaluation of Azeron Adaptive Keypad Prototypes for Users with Special Needs

The Riga Stradins University Institute of Occupational Safety and Environmental Health, in collaboration with company Azeron, conducted an ergonomic study on the usability of newly developed Azeron keypad prototypes. The project aimed to assess their suitability for individuals with special needs and to optimize their ergonomic parameters for safe and efficient use.
Using surface electromyography (sEMG), the study analyzed muscle strain and movement patterns while operating various Azeron keypad prototypes, including a rotating potentiometer, trackball, trackpad, a shortened tower, Keyzen prototype, and a joystick-equipped module. The tests were conducted in controlled laboratory conditions to ensure reliable and reproducible results. Key ergonomic factors, such as muscle workload, posture, and ease of use, were compared with standard input devices, including traditional keyboards and gaming mice.
Findings indicate that the new Azeron prototypes offer significant adaptability for users with hand mobility impairments. Certain design refinements were recommended to further enhance usability and reduce muscle strain. The project also formulated best-use guidelines for the Azeron keypads to promote long-term comfort and prevent musculoskeletal issues.