daHz(decahertz)

In the field of frequency, unit decahertz (daHz) is a unit of measurement representing a frequency of ten hertz. It signifies ten oscillations, vibrations or cycles per second wherever frequency is measured. Essentially, 1 decahertz is equal to 10 hertz (1 daHz = 10 Hz), so it is used when dealing with frequencies that are multiple of tens.

µHz(microhertz)

In the field of frequency, µHz (microhertz) is a unit of measurement that represents a frequency of one millionth (1/1,000,000) of a hertz. Frequency is the number of occurrences of a repeating event per unit of time, typically represented using the unit "hertz" (Hz). One hertz is equal to one cycle or oscillation per second. A microhertz (µHz), therefore, represents an extremely low frequency where there is one cycle or oscillation per million seconds (1,000,000 seconds or roughly 11.6 days). This unit is used to describe extremely low-frequency signals or processes, such as certain astronomical or geophysical phenomena.