1.First, say 'sorry' and gently pass it first you don't understand.

• Remorseful?
• Remorseful, but I can not hear clearly.
• I don't (quite) have it.
• Sorry, I had been a little confused.
• Excuse me, I don't determine what you said currently.

2. Question to talk again. Or explain more.

• Can you speak again?
• Could you speak slowly?
• Can you explain me again?