tambour sound

[tămbur′, tăm-bur]
n.
  1. A heart sound, usually the aortic- or pulmonic-valve closure sound when it has a booming and ringing quality like that of a drum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.