BACKGROUND During the cardiac cycle, the heart normally produces repeatable physiological sounds. However, under pathologic conditions, such as with heart valve stenosis or a ventricular septal defect, blood flow turbulence leads to the production of additional sounds, called murmurs. Murmurs are random in nature, while the underlying heart sounds are not (being deterministic). INNOVATION We ...

Today, modern technology has provided more powerful tools to evaluate the information related to heart sounds that traditional tools like stethoscope cannot achieve. One of the most common methods used for listening and tracking the heart sounds is to record them with special devices. The recorded heart sounds is known as PCG (phonocardiogram) signal. It is a particularly useful diagnosis tool ...

Although music and the emotion it conveys unfold over time, little is known about how listeners respond to shifts in musical emotions. A special technique in heavy metal music utilizes dramatic shifts between loud and soft passages. Loud passages are penetrated by distorted sounds conveying aggression, whereas soft passages are often characterized by a clean, calm singing voice and light accomp...

Asynchrony of ventricular contraction causes splitting of the first and second heart sounds which can be detected clinically in most normal subjects, and deviations from normal due to electrical or mechanical delays on one or other side of the heart have received much attention as valuable physical signs and in the understanding of hxmodynamics. Electrical delays causing ventricular asynchrony ...

a one-month-old male terrier dog was referred in shock status with a history of anorexia, tachypnea, abdominal distention and progressive weight loss. auscultation of right side of the lungs found enhanced respiratory noises. the thorough auscultation of the opposite side of the chest revealed the presence of typical intestinal sounds. cardiac auscultation revealed muffled heart sounds and a di...

dynamic correlates of the third heart sound. Am J Physiol 207: 319, 1964 7. Prewitt T, Gibson D, Brown D, Sutton G: The 'rapid filling wave' of the apexcardiogram: its relation to echocardiographic and cineangiographic measurements of ventricular filling. Br Heart J 37: 1256, 1975 8. Boyer NH, Eckstein RW, Wiggers CJ: The characteristics of normal heart sounds recorded by direct methods. Am Hea...

This letter presents the first implementation of autonomous robotic auscultation heart and lung sounds. To select locations that generate high-quality sounds, a Bayesian Optimization (BO) formulation leverages visual anatomical cues to predict where sounds might be located, while using auditory feedback adapt patient-specific qualities. Sound quality is estimated online machine learning models ...