myogen.simulator.SurfaceEMG.add_noise#

SurfaceEMG.add_noise(
snr__dB: float,
noise_type: str = 'gaussian',
) → SURFACE_EMG__Block[source]#

Add noise to all electrode arrays.

This method adds realistic noise to the simulated surface EMG signals based on a specified signal-to-noise ratio. The noise is calculated and applied independently for each electrode channel to ensure that channels with different signal amplitudes maintain the specified SNR.

Parameters:

  • snr__dB (float) – Signal-to-noise ratio in dB. Higher values result in cleaner signals. Typical physiological EMG has SNR ranging from 10-40 dB. The SNR is applied independently to each electrode channel.

  • noise_type (str, default="gaussian") – Type of noise to add. Currently supports “gaussian” for white noise.

Returns:

Noisy EMG signals for each electrode array as a neo.Block. Results are stored in the noisy_surface_emg__Block property after execution.

Return type:

SURFACE_EMG__Block

Raises:

ValueError – If surface EMG has not been simulated. Call simulate_surface_emg() first.

Notes

The noise is computed per-channel (per electrode) to maintain the specified SNR independently across all channels. This ensures that electrodes with different signal amplitudes receive appropriately scaled noise.

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