You need to be able to hear every word of the recording. We want machine learning algorithms to be able to handle a variety of background noise, and even relatively loud noises or quiet background music can be accepted provided that they don’t prevent you from hearing the entirety of the text. Crackles or ‘breaking up’ that prevent you hearing the text means you should reject the clip.
Se deve poei sentî tutte e poule da registraçion. Voemmo che i algoritmi de machine learning seggian boin à sentî unna varietæ de sciati de fondo, e fiña di sciati fòrti ò da muxica de fondo a peu anâ ben, fintanto che no impediscian de sentî tutto o testo. E registraçioin con di fruscii, di sciati ò de interruçioin che no permettan de sentî o testo an da ëse refuæ.