You could try the attached Nyquist plugin. It’s Steve’s, not mine and it is experimental so use at your own risk. You are labelling the sounds. There is a control for minimum label length.
See here for how to install Nyquist plugins: http://manual.audacityteam.org/o/man/effect_menu.html#nyquist_effects. You can add it to an Audacity batch processing “Chain” but it won’t help much because you can only export single files using a Chain, not export multiple. You would have to apply the Sound Finder to a file then export multiple manually.
In any case Audacity re-encodes MP3’s so you will degrade them. You will be better to search further for direct MP3 editors. Did you try mp3DirectCut? It is supposed to have “Auto cue with minimum length”. See here or read their documentation.
Gale
soundFinder-New3.ny (5.98 KB)