What is a tuning fork used for in frequency measurement?

The tuning fork is primarily used as a frequency reference device for calibrating instruments. It produces a specific frequency when struck, which is based on its design and the material it is made from. When the fork resonates, it generates a pure tone at a fixed frequency—commonly 440 Hz, which corresponds to the musical note A above middle C. This characteristic allows it to serve as a standard reference point not only for tuning musical instruments but also for calibrating other devices that require precise frequency measurements.

The clear and consistent frequency output makes the tuning fork particularly valuable in various applications, including acoustics, where frequency accuracy is essential. Its simplicity and reliability ensure that it remains a practical tool for both musicians and technicians involved in sound and vibration measurement.