used in `compress_low_energy()` utilisé en `compress_low_energy`()`
compress_trans(intercept = 2000, ratio = 5)
the wavenumber at which compression starts le nombre d'onde auquel la compression commence
the rate of compression (larger numbers are more compressed) le taux de compression (des nombres plus grands sont plus compressés)
From https://stackoverflow.com/a/43321639 & https://stackoverflow.com/a/78360580