Objective: How can I get an elderly person to hear me better?

Which of the following solutions is more sound in terms of naive physics reasoning?

Possible answers:
[i] Speak more deeply, when people lose hearing they lose the higher tones first, talking in deep voice is better than loud.;
[ii] Speak more honestly, when people lose hearing they lose the higher tones first, talking in deep voice is better than loud.;
[i]