Stridor

• Stridor: A high-pitched wheezing sound resulting from turbulent airflow in the upper airway.
• Snoring: A low-pitch sound caused by tissue vibration of the nasopharynx, pharynx, and soft palate due to obstruction above the larynx.

Types of Stridor

• Inspiratory Stridor: Supraglottic, glottic obstruction
• Expiratory Stridor: Trachea (lower)
• Biphasic Stridor: Subglottic obstruction

harsh inspiratory sound caused by partial obstruction of a large airway.