S1 and S2 are the normal heart sounds you hear when the heart valves close. Heart murmurs are extra sounds that can be heard during systole, diastole, or as a continuous sound. S3 and S4 are abnormal ...

WASHINGTON, D.C., May 8, 2018 -- Have you ever turned the dial on the radio or switched the television channel because you found the quality of the presenter's voice grating? What is it about a person ...

Humans communicate their intentions, feelings and desires verbally, so voice disorders can have devastating personal and professional consequences. A perceived voice abnormality may lead to a negative ...