Let us next carry out auscultation at the apex, and in this case, we shall listen with both the diaphragm to appreciate the higher frequency sounds, and the bell to appreciate the lower frequency sounds. We shall use the carotid artery as the timing mechanism, taking a cotton swab that will be displaced during the carotid impulse during systole, so that we can clearly evaluate these apical acoustic events first with the diaphragm. Everyone listen. [Sounds] and then we shall also listen with the bell, again, with the timing mechanism of the carotid artery.