Which high frequency filter setting is recommended for recording submental EMG?

The recommended high-frequency filter setting for recording submental electromyography (EMG) is 100 Hz. Setting the high-frequency filter at this level helps to effectively remove high-frequency noise from the EMG signal while still allowing the capture of the relevant muscle activity.

Submental EMG, which assesses the activity of the muscles under the chin, often has frequency components that are below and around the set threshold. A filter at 100 Hz is optimal because it can effectively preserve the signal of interest without introducing distortion or losing important data. Higher filter settings, such as 200 Hz or 300 Hz, could attenuate significant parts of the muscle activation signal itself, leading to a less accurate and useful recording.

Using too low of a frequency, like 50 Hz, may not adequately filter out undesirable high-frequency noise from the EMG signal, which can compromise the quality of the data collected. Therefore, selecting 100 Hz strikes a balance between filtering noise and capturing the submental EMG activity accurately.