In Psalm 141 David leads with a standard way that prayer would be understood: “Give ear to my voice.”  Then he goes on to list a number of ways his senses, organs and those around him can participate in effectual prayer:

• Let my prayer be counted as incense before you and the lifting up of my hands as the evening sacrifice – Please consider my prayers as worship before you
• Set a guard, O LORD, over my mouth; keep watch over the door of my lips – May the words of my prayers be pleasing
• Do not let my heart incline to any evil, to busy myself with wicked deeds – May the mediations of my heart be acceptable
• Let a righteous man strike me; if it is a kindness, a rebuke will be oil for my head – use my friends and fellow worshipers to correct me
• My eyes are toward you, O GOD, my Lord; in you I seek refuge – we don’t know what to do, but our eyes are on you.

This is an intense and weighty prayer involving the whole person, not just the voice.