Above all else, seek to be obedient to God's presence, not determining ahead of time whether you will speak or refrain from speaking. Someone else's voice may at first appear to be a jarring interruption to your own train of thought, but listen hard to what God might want to say to you through that which is spoken. Be sensitive to how God wants you to respond, whether vocally or in silent prayer and thought. Take time to reflect more deeply on what the speaker says, rather than rising quickly to answer. Speak audibly and distinctly.
Many Friends have difficulty hearing others.
Be sensitive to their needs. Let God's Spirit discipline your mind. Let your words be few and full. Speak directly to the point without wandering. If it is only your will that prompts you, God's grace will enable you to remain seated, with benefit to yourself and to others.