And do you have a reference for that? Just because something is the “more perfect” way doesn’t mean that other ways are somehow vitiated by it. Besides, mental prayer is supposed to be a higher form of prayer than vocal. Vocal leads to mental, of course.
I would hope that listening to prayers is the same as praying them–and not just the physical act of listening to them, but uniting your heart and mind and intentions with what is being prayed. Otherwise, we’d not be praying for 90% of the Mass, wherein we’re listening to the priest or the deacon or the lector vocalizing everything. Furthermore, that would make it difficult on the many clergy out there who meet their obligation to pray the Liturgy of the Hours via apps, recordings, or even having someone read it to them. I’ve been in the car with a priest friend before and read the Office to him, and we both satisfed our obligation thereby even though he couldn’t have moved his lips to the text I was reading or given responses other than to answer the “Glory be.” As for recordings of the rosary or chaplet, I don’t see any difference between it being said live or being recorded; the end result is still the same–words are spoken somehow, you are listening to them and uniting your intentions to them. That seems to be the key in all of this.
-ACEGC