Orders of magnitude (frequency)
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| Orders of magnitude |
|---|
| area |
| angular velocity |
| currency |
| data |
| density |
| energy |
| frequency |
| length |
| mass |
| numbers |
| power |
| pressure |
| specific heat capacity |
| speed |
| temperature |
| time |
| volume |
| Conversion of units |
| physical unit |
| SI |
| SI base unit |
| SI derived unit |
| SI prefix |
| Planck units |
To help compare different orders of magnitude, the following list describes various frequencies.
Examples
- 0.25 Hz, approximate frequency of an adult human's resting breathing rate
- 1 Hz, approximate frequency of an adult human's resting heart beat
- 10 Hz, cyclic rate of a typical automobile engine at idle (equivalent to 600 rpm)
- 50 Hz or 60 Hz (50 Hz for European AC, Tokyo AC or 60 Hz for American AC, Osaka AC), electromagnetic — standard AC mains power
- 20 Hz to ~14 kHz, acoustic — normal range of adult human hearing (most children and some animals perceive sounds outside this range, most teens and children can hear frequencies from 14 kHz up to ~16 kHz where most adults can't)
- 100 Hz, cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm)
- 261.626 Hz, acoustic — the musical note middle C
- 440 Hz, acoustic — concert pitch (A above middle C), used for tuning musical instruments
- 530 kHz to 1.710 MHz, electromagnetic — AM radio broadcasts
- 740 kHz, transitions — the clock speed of the world's first commercial microprocessor, the Intel 4004 (1971)
- 1 MHz to 8 MHz, transitions — clock speeds of early home/personal computers (mid-1970s to mid-1980s)
- 42 MHz to 260 MHz, electromagnetic — VHF terrestrial TV broadcast channels
- 88 MHz to 108 MHz, electromagnetic — FM radio broadcasts
- 1420 MHz, the frequency of the hyperfine transition of hydrogen, the most common element in the universe.
- 0.8 to 2.3 GHz, (electromagnetic) - mobile phone conversation channels.
- 2.4 GHz, (electromagnetic) - microwave ovens and Wireless LANs.
- 3.80 GHz, transitions — highest clock speed Pentium 4 "Prescott" microprocessor (2005)
- 428 THz to 750 THz, electromagnetic — visible light, from red to violet
- 30 PHz, electromagnetic — x-rays
- 300 EHz and above - gamma rays
Lower frequencies
- Once per minute (one rpm): about 16.667 mHz
- Hourly: about 277.8 µHz
- Daily: about 11.57 µHz
- Weekly: about 1.653 µHz
- Monthly: about 380.5 nHz
- Yearly: about 31.71 nHz
- Once per decade: about 3.171 nHz
- Once per generation: about 1 nHz
- Once per century: about 317.1 pHz
- Once per millennium: about 31.71 pHz
Radio spectrum
| Radio spectrum | ||||||||||
| ELF | SLF | ULF | VLF | LF | MF | HF | VHF | UHF | SHF | EHF |
| 3 Hz | 30 Hz | 300 Hz | 3 kHz | 30 kHz | 300 kHz | 3 MHz | 30 MHz | 300 MHz | 3 GHz | 30 GHz |
| 30 Hz | 300 Hz | 3 kHz | 30 kHz | 300 kHz | 3 MHz | 30 MHz | 300 MHz | 3 GHz | 30 GHz | 300 GHz |
See also
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