Classification of very noisy EMG signals

1. How do you classify EMG signals?
2. What type of noise affects EMG signal quality?
3. What does a noisy EMG mean?
4. What is the frequency range of electromyogram type noise?

How do you classify EMG signals?

Generally, features in the analysis of EMG signals can be divided into three categories, including time domain (TD) features, frequency domain (FD) features and time-frequency domain (TFD) features [29,43,44]. For TD features, the features are evaluated based on signal amplitude that varies with time.

What type of noise affects EMG signal quality?

Electrical noise, which will affect EMG signals, can be categorized into the following types. All electronics equipments generate noise. This noise cannot be eliminated; using high-quality electronic components can only reduce it. Electromagnetic radiation is the source of this kind of noise.

What does a noisy EMG mean?

Noisy EMG signals can be a common problem during EMG recording. Noise can be generated from non-biological sources, such as poor contact between the recording electrodes and skin, or electrical noise in the room from fluorescent lighting for example.

What is the frequency range of electromyogram type noise?

The EMG frequency ranges vary from Hz to 10 kHz, depending on the type of examination (invasive or noninvasive). The most useful and important frequency ranges are within the range from 50 to 150 Hz [6,7,8,9,10].