Our knowledge of lung sounds is based largely on empirical observation. Laënnec (1) knew that the sounds heard by applying the ear directly to the chest provided useful information, and he was delighted when he found that a device intended to preserve decorum unexpectedly presented better information. With enormous industry, and with access to a large population of pulmonary patients both clini...

This report is concerned primarily with the effect of sound intensity on the respiratory response in newborn infants. Each of 9 infants between the ages of 2 and 5 days was presented repeatedly with a 5-sec. duration white noise stimulus varying in intensity from 55 to 100 db., while cardiac and respiratory activities were continuously recorded. In general, the response to a sound stimulus cons...

BACKGROUND Automatic detection or classification of adventitious sounds is useful to assist physicians in diagnosing or monitoring diseases such as asthma, Chronic Obstructive Pulmonary Disease (COPD), and pneumonia. While computerised respiratory sound analysis, specifically for the detection or classification of adventitious sounds, has recently been the focus of an increasing number of studi...

Covid-19 is a new variety of coronavirus that affects millions people around the world. This virus infected and hundreds thousands have passed away. Due to panic caused by Covid-19, recently several researchers tried understand propose solution problem. Especially, researches in machine learning (ML) been proposed detect using X-ray images. In this study, 10 classes respiratory sounds, includin...

OBJECTIVE to evaluate the respiratory status of postoperative adult patients by assessing the nursing outcome Respiratory Status. METHOD descriptive, cross-sectional study developed with 312 patients. Eighteen NOC indicators were assessed and rated using a Likert-scale questionnaire and definitions. Descriptive and correlative analysis were conducted. RESULTS the most compromised clinical i...

During the course of an investigation of methods for producing hypnagogic states, it was noted that monotonous sounds were most efficacious when they occurred with. a rhythmic frequency approximating that of the spontaneous respiratory rate of the subject. Consequently, a technique was developed for using the subject's breath sounds as the potent rhythmical stimulus. This instrument is describe...

Heart sounds carry information about the mechanical activity of the cardiovascular system. This information includes the specific physiological state of the subject, and short term variability related to the respiratory cycle. The interpretation of the sounds and extraction of changes in the physiological state, while monitoring short term variability is still an open problem and is the subject...

Heart sounds carry information about the mechanical processes in the cardiovascular system. This information includes the specific physiological state of the subject, and short term variability related to the respiratory cycle. This thesis presents a novel computational framework for analysis of data with multi-level variability, caused by externally induced changes. The framework presented inc...

BACKGROUND Although congestive heart failure (CHF) patients typically present with abnormal auscultatory findings on lung examination, respiratory sounds are not normally subjected to additional analysis. The aim of this pilot study was to examine respiratory sound patterns of CHF patients using acoustic-based imaging technology. Lung vibration energy was examined during acute exacerbation and ...

Textbooks, clinicians, and medical teachers differ as to whether the stethoscope bell or diaphragm should be used for auscultating respiratory sounds at the chest wall. Logic and our results suggest that stethoscope diaphragms are more appropriate.