The sensor's capacity to block unwanted signals is referred to as the CMRR (Common Mode Rejection Ratio). The sensor can better distinguish between muscle signals and noise when the CMRR is higher. Gain, which determines how much the sensor amplifies the muscle signals, is the amplification factor of the sensor. The resistance provided by the sensor to the flow of electrical current is referred to as input impedance. A higher input impedance results in more accurate measurements.