You will hear this sound at the apex in the left lateral position. Use the bell of the stethoscope. Normal in children and young adults. It is abnormal when it persists in a person. Usually abnormal in adults over the age of 40 and can be an early sign of heart disease or congested heart failure.
verb (used without object), subsided, subsiding. 1. to sink to a low or lower level. 2. to become quiet, less active, or less violent; abate: The laughter subsided. 3. to sink or fall to the bottom; settle; precipitate: to cause coffee grounds to subside. Origin of subside.
Sea level rise is also known as submergence, since land above current mean sea level is drowned or submerged. When the Earth enters a period of glaciation and sea levels drop, bays, gulfs, and estuaries dry up and become low-lying land. This is known as emergence, when new land appears and the coastline is increased.