Local musicians gathered at Club Passim on Sunday night for “An Evening Celebrating the Human Voice,” a concert to benefit the Voice Health Institute at Mass. General. The VHI is run by Dr. Steven Zeitels, the famous voice doctor who has helped artists such as Adele , Steven Tyler, Julie Andrews, Christina Perri, and Cher. Sunday’s list of performers included Lori McKenna, Dennis Brennan, Sarah Borges, and Jennifer Kimball. Zeitels was there to mingle with the musicmakers and to talk to the crowd about his work.