millihertsien

Millihertz (mHz) is a unit of frequency, equal to one thousandth of a hertz (Hz). It is used to measure relatively low frequencies, typically in the range of 0.001 to 1 Hz. The term "millihertz" is derived from the prefix "milli-", which denotes a factor of one thousandth, and "hertz", named after the German physicist Heinrich Hertz.

The millihertz is commonly used in various scientific and engineering fields to describe phenomena with slow or periodic changes. For example, it is used in geophysics to study the Earth's magnetic field variations, in biology to measure the heart rate variability, and in telecommunications to describe the drift of oscillator frequencies.

One millihertz is equivalent to 0.001 cycles per second, or 1 cycle per 1000 seconds. It can also be expressed in other units of frequency, such as radians per second (rad/s), where 1 mHz is approximately 0.00628 rad/s.

The millihertz is part of the International System of Units (SI), and its symbol is "mHz". It is important to note that the millihertz should not be confused with the millihertzian, which is a unit of magnetic field strength.

In summary, the millihertz is a unit of frequency used to measure low-frequency phenomena. It is equal to one thousandth of a hertz and is commonly used in various scientific and engineering fields.