Final answer:
An abnormal sound or murmur heard while auscultating an organ or artery is known as a bruit, caused by turbulent blood flow due to narrowing or valve issues. These sounds can be detected and analyzed using diagnostic tools like echocardiograms.
Step-by-step explanation:
The term abnormal sound or murmur referred to in the question is known as a bruit. This sound is often discovered while auscultating an organ, gland, or artery. A bruit typically arises from the turbulent flow of blood due to an occlusion or irregularity within an artery or around insufficiently closed heart valves. For instance, during auscultation, a clinician may detect Korotkoff sounds, which are a specific kind of turbulence heard when measuring blood pressure or a murmur from turbulent flow in heart conditions such as valvular disorders. Echocardiograms and phonocardiograms are diagnostic tools used to help in the recording and analysis of these sounds.