What Is natural frequency

The natural frequency depends just from two things: the physical characteristics of the material (e.g. stiffness) and its mass . This means it does not depend from how violently we hit or pinch the material. Indeed, as you pinch a string, it produces the same sound irrespectively of the force with which you pinched it.

When an object vibrates at a frequency equivalent to its natural frequency, the vibration of the amplitude increases significantly which could lead to irreparable damage , therefore, it is important to know the natural frequency.

Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and periodic phenomena , such as mechanical vibrations, audio signals (sound), radio waves, and light.