Systems, methods, devices and apparatuses for detecting facial expression

A facial expression determination system for determining a facial expression on a face of a user comprising:

• an apparatus comprising a plurality of EMG (electromyography) electrodes configured for contact with the face of the user;
• and
• a computational device configured with instructions operating thereon to cause the computational device to:
• process a plurality of EMG signals received from said EMG electrodes to form processed EMG signals;
• and
• classify a facial expression according to said processed EMG using a classifier, wherein:
• said processing comprises determining a roughness of said EMG signals according to a predefined window, and
• said classifier classifies the facial expression according to said roughness.