Rhonchi Lung Sounds

  • These are low pitched, snore-like sounds.
  • They are caused by airway secretions and airway narrowing.
  • They usually clear after coughing.

Rhonchi are also described as "continuous" sounds. They are lower in pitch than wheezes and have a snoring quality. They also have a sinusoidal pattern on waveform, but the number of deflections per unit time is less than that of wheezes as they are of lower frequency. Although rhonchi are almost always due to airway secretions and usually clear with cough, they may be present in other conditions that cause airway narrowing.