![]() ![]() Continuous sounds include ronchi and wheezes. ![]() Discontinuous adventitious breath sounds include crackles (also called rales). It is important to know where these sounds are normally heard as hearing certain sounds in locations where they are not normally found may signify pathology.Ĭlick on the interactive icon for specific descriptions of these sounds, and for practice listening to these sounds.Ībnormal or adventitious breath sounds may indicate the presence of pathology and are generally divided into two categories: discontinuous and continuous sounds. Normal breath sounds include vesicular, bronchial and bronchovesicular breath sounds. Normal breath sounds are generally softer at the apices and become louder at the bases. Note these characteristics as you listen in different areas. Normal breath sounds differ over various portions of the lungs with regard to intensity, pitch, and relative duration of inspiratory and expiratory phases. Lung sounds are absent over a pneumothorax. ![]()
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