Joint noises may require auscultation with a stethoscope to detect. Listening to the lungs with a stethoscope (auscultation) can also reveal signs associated with CAP. They are usually heard only with a stethoscope ("on auscultation"). Bird's stethoscope had a single earpiece. A doctor uses a stethoscope to listen to the breathing. Basic diagnostic medical devices (e.g. stethoscope, tongue depressor) are typically used. Crackles or wheeze are typical findings on listening to the chest with a stethoscope. A "fetal stethoscope" or "fetoscope" is an acoustic stethoscope shaped like a listening trumpet. So were the stethoscope, the electrocardiograph, and the endoscope. Rales may be heard with listening to the lungs with a stethoscope. Crackles may also be heard over the lungs on examination with a stethoscope. Bucky with a stethoscope is occasionally used by the Medical Alumni Association. Healthcare providers are often seen or depicted wearing a stethoscope around the neck. The reproduced sound was heard through rubber listening tubes like those of a stethoscope. In rare cases, tinnitus can be heard by someone else using a stethoscope.