|Other ways to|
to say hertz
|cycles per second|
The hertz (symbol: Hz, definition: 1/s) is a unit derived from time which measures frequency in the International System of Units (SI). Frequency is how often something happens. A frequency of 1 hertz means that something happens once a second. While hertz or Hz are the standard ways to express this unit, other expressions are sometimes used, as shown in the table.
The basic unit is 1/second. The unit is named after a German physicist Heinrich Rudolf Hertz.
Multiple units[change | change source]
1000 hertz is 1 kilohertz. 1000 kilohertz is 1 megahertz, 1000 megahertz is 1 gigahertz: (see table)
|Kilohertz (kHz)||1000 Hz|
|Megahertz (MHz)||1000 kHz|
|Gigahertz (GHz)||1000 MHz|
|Terahertz (THz)||1000 GHz|
|Petahertz (PHz)||1000 THz|
|Exahertz (EHz)||1000 PHz|
|Zettahertz (ZHz)||1000 EHz|
|Yottahertz (YHz)||1000 ZHz|
Examples[change | change source]
- The frequency of the Earth's spinning (once per ~24 hours) is about 12 microhertz (much smaller than 1 Hz).
- The hertz is sometimes used to measure the power of a processor in computing and electronics.
- Amateur radio in the United States Of America is at different frequencies between 1.8 and 1300 MHz
- Air traffic control uses frequencies between 3 and 25 MHz as well as frequencies between 108 and 136 MHz
- Musical note middle G (G4) has a frequency of 392 Hz.
Sources[change | change source]
- "Sensitivity of Human Ear". Retrieved 9 February 2016.
- "Frequency Hearing Ranges in Dogs and Other Species". Retrieved 9 February 2016.
- "Frequency Allocations". Retrieved 9 February 2016.
- "Aviation Radio Bands and Frequencies". Smeter. Retrieved 9 February 2016.