remove_background_noise

echopype.clean.remove_background_noise(ds_Sv: Dataset, ping_num: int, range_sample_num: int, background_noise_max: str = None, SNR_threshold: float = '3.0dB') → Dataset

Remove noise by using estimates of background noise from mean calibrated power of a collection of pings.

Parameters

ds_Svxr.Dataset

dataset containing Sv and echo_range [m]

ping_numint

Number of pings to obtain noise estimates.

range_sample_numint

Number of samples along the range_sample dimension to obtain noise estimates.

background_noise_maxstr, default None

The upper limit for background noise expected under the operating conditions.

SNR_thresholdstr, default “3.0dB”

Acceptable signal-to-noise ratio, default to 3 dB.

Returns

The input dataset with additional variables, including

the corrected Sv (Sv_corrected) and the noise estimates (Sv_noise)

Notes

This function’s implementation is based on the following text reference:

De Robertis & Higginbottom. 2007. A post-processing technique to estimate the signal-to-noise ratio and remove echosounder background noise. ICES Journal of Marine Sciences 64(6): 1282–1291.