De-essers may have been used on the recordings you compare yourself too.
Various de-esser plugins are available for audacity, e.g. … https://forum.audacityteam.org/t/updated-de-clicker-and-new-de-esser-for-speech/34283/199
De-essers may have been used on the recordings you compare yourself too.
Various de-esser plugins are available for audacity, e.g. … https://forum.audacityteam.org/t/updated-de-clicker-and-new-de-esser-for-speech/34283/199