sound out

verb3

1. •
   To question and listen attentively in order to discover a person's opinion, intent, or preference, especially by using indirect conversational remarks.

   • You'll have to ask them—sound them out. — 1918
2. •
   To pronounce a word or phrase by articulating each of its letters or syllables slowly in sequence.
3. •
   To speak or sing loudly, to call out.

   • Sound out, voices of young men! loudly and musically call me by my nighest name! — 1855