Soft blowing sound heard on auscultation; may result from vibrations associated with the movement of blood, valvular action or both:

The answer is bruit or murmur. In addition, a murmur is just a word used to define an abnormal sound produced by turbulent blood flow. One of the more communal ones that a person will hear is a carotid artery bruit which is heard by putting the stethoscope over the carotid artery.