What unit is used to measure frequency?

Frequency is measured in Hertz (Hz), which is defined as the number of cycles of a periodic wave that occur in one second. For instance, if a sound wave completes 440 cycles in one second, it has a frequency of 440 Hz, which is commonly associated with the musical note A above middle C.

The other units mentioned—decibels, joules, and watts—are used to measure different physical quantities. Decibels measure sound intensity or power level, joules measure energy, and watts measure power. Understanding these distinctions is essential for comprehending various scientific and engineering concepts.