Potential causes include tuberculosis and pneumonia. The sound quality is considered a harsh grating or creaking. The pleural rub sound results from the movement of inflamed pleural surfaces against one another during chest wall movement. Fine crackles sound quality is like hair rubbing near the ear and may be heard in congestive heart failure and pulmonary fibrosis. Coarse crackles sound quality is low-pitched and moist it may be heard in pulmonary oedema and bronchitis. Crackles can be further categorised as coarse or fine. It is commonly heard in the bases of the lung lobes during inspiration. The cause of crackles can be from air passing through fluid, pus or mucus. The sound crackles create are fine, short, high-pitched, intermittently crackling sounds. It may be heard in asthma, emphysema and chronic bronchitis.Ĭrackles are also known as alveolar rales. It is commonly heard in the lungs during expiration. Alternately, what we often refer to as rhonchi is the sonorous wheeze, which refers to a deep, low-pitched rumbling or coarse sound, as air moves through tracheal/bronchial passages in the presence of mucus or respiratory secretions. This refers to the high-pitched, whistle-like sound. The classic wheeze may be referred to as a sibilant wheeze. This is caused by air passing through an obstructed, narrow airway. The sound of a wheeze is a high-pitched, continuous musical sound. It’s typically loudest over the anterior neck, as air moves turbulently over a partially-obstructed, upper airway. Stridor may be heard in conditions such as croup and foreign body obstruction. The cause of this sound is generally the partial obstruction of the larynx or trachea. Pleural friction rub is caused by inflammation that roughens the surfaces of the visceral and parietal pleura.Stridor is a continuous, high-pitched, crowing sound heard predominantly on inspiration. Pleural friction rub is characterized by creaking, grating, or rubbing sounds that can be heard during both inspiration and expiration. What does pleural friction rub sound like? Potential causes of stridor include anaphylaxis, foreign body aspiration, laryngeal or tracheal stenosis, or epiglottitis. Note: Any client presenting with stridor requires immediate medical attention to prevent a complete, potentially life-threatening airway obstruction. Stridor indicates a narrowed or obstructed upper airway, which can significantly impede airflow. It may be louder over the neck and can signify a medical emergency. Stridor is a high-pitched, wheezing sound that’s usually heard on inspiration. Rhonchi are caused by blockage in the large airways due to fluid, mucus, or other secretions in the lungs. Rhonchi are low-pitched rattling sounds that may sound like snoring, gurgling, or wheezing. What causes crackles?Ĭrackles are caused by fluid in the smaller areas of the lungs such as in the alveoli. What do crackles sound like?Ĭrackles are described as bubbling, popping, or clicking noises that are best heard during inhalation and may be moist, dry, fine, or coarse. Wheezing is caused by vibrations of constricted airway walls induced by a diminished airflow. Wheezing is a high-pitched whistling sound that is commonly heard with expiration and may be heard with inspiration or throughout the cycle depending on the severity of inflammation and constriction.
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