Share. By Alison Doyle. According to the Bureau of Labor Statistics, the median wage for workers in the United States at the end of September 2014 was $790 per week or $41,080 per year for a 40 hour work week. Wages were 2.5% higher than at the same date for the previous year.
Normal. The two major sounds heard in the normal heart sound like âlub dubâ. The â lubâ is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,â dubâ or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.
Put your head on someone's chest and the heartbeat sounds a bit like lub-DUB, lub-DUB, lub-DUB. The lub is the sound of the tricuspid and mitral valves closing. The DUB is the sound of the aortic and pulmonary valves closing. Together, they're the sound of someone's heart doing its job.