hz
Definition
Noun: * The unit of frequency: A hertz (Hz) is the standard scientific unit for measuring frequency. It is defined as one cycle per second. It is used to measure how often a repeating event occurs in one second.
Usage
- Hz is an abbreviation for "hertz". It is always written with a capital 'H' and a lowercase 'z'. It follows a number.
- It is used in scientific, technical, and everyday contexts to describe the frequency of waves (like sound, light, or radio) or the rate of any periodic process.
Examples
- The standard pitch for musical tuning is A4 = 440 Hz.
- This power supply operates at 60 Hz.
- Human hearing typically ranges from 20 Hz to 20,000 Hz.
- The processor's clock speed is 3.5 gigahertz (GHz), which is 3.5 billion Hz.
Advanced Usage
- Kilohertz (kHz): 1,000 hertz.
- An AM radio station might broadcast at 540 kHz.
- Megahertz (MHz): 1,000,000 hertz.
- Older computer processors were measured in MHz.
- Gigahertz (GHz): 1,000,000,000 hertz.
- Modern CPU speeds are often measured in GHz.
Variants and Related Words
- Hertz: The full, unabbreviated form of the unit. It is synonymous with Hz.
- Cycle per second (cps): An older term that is equivalent to one hertz. Hz is now the standard term.
- Frequency: The general concept that Hz measures (the rate of occurrence of a repeating event).
Synonyms
- Cycle per second (cps) (archaic/technical)
Notes
- The unit is named after Heinrich Hertz, a German physicist who made important contributions to the study of electromagnetism.
- It is an SI derived unit (International System of Units).
Noun
- the unit of frequency; one hertz has a periodic interval of one second
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