What happens to radio communication between two people if one approaches a black hole?

Question

Physics

Since time will slow down for a person approaching a black hole, will the second person hear his voice more and more "stretched out"?

Answer 1

Due to relativistic effects near a black hole, radio signals sent from a transmitter falling into a black hole will experience a redshift (and more so the closer to the event horizon) in the eyes of a distant observer. Accordingly, the receiver and transmitter tuned to the same frequency will not be able to work.

Answer 2

Now experts on travel near black holes will gather and tell.
Given the unimaginable gravity of a black hole, I would rather ask: Will the second hear the voice in principle? Wouldn't the sound wave be sucked into the bowels of the black hole?