Woodwind instruments like the clarinet and oboe rely on the Bernoulli principle to produce sound. When a musician blows air into the mouthpiece, the air moves at a high velocity past a flexible reed. According to fluid dynamics, this high-speed air creates a region of low pressure, which causes the reed to be sucked shut against the mouthpiece. As the reed closes, the airflow is cut off, the pressure equalizes, and the reed's natural elasticity snaps it back open. This cycle repeats hundreds or thousands of times per second, creating a series of air pulses that we perceive as a musical pitch. The length of the instrument's tube, controlled by opening or closing finger holes or keys, determines the frequency of these vibrations. This complex interaction between physics and craftsmanship allows for the wide expressive range and unique timbres found in the woodwind family.