What is the SI unit for measuring frequency?

The SI unit for measuring frequency is Hertz. Frequency refers to the number of occurrences of a repeating event per unit of time, and it is commonly associated with waves, such as sound waves, light waves, and electromagnetic waves. One Hertz is defined as one cycle per second, which directly relates to how frequently an event occurs.

The other units mentioned are associated with different physical quantities. Joules measure energy, Newtons measure force, and decibels measure sound intensity. These units serve distinct purposes and are not applicable for describing frequency, which is specifically quantified in Hertz. Understanding the context and dimensions of each SI unit illuminates why Hertz is the correct choice for measuring frequency.