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.

1 Examples
- 1.1 Lower frequencies
- 1.2 Radio spectrum
2 See also

[edit] 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
2 Hz, 120 bpm, one of the most common tempi in music.
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
902 MHz to 928 MHz, common cordless telephone frequency in the US
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.
1920-1930 MHz, another common cordless telephone frequency introduced to the US in October 2005
2.4 GHz, (electromagnetic) - microwave ovens, Wireless LANs and cordless phones (starting in 1998).
3.80 GHz, transitions — highest clock speed Pentium 4 "Prescott" microprocessor (2005)
5.8 GHz, cordless phone frequency introduced in 2003
428 THz to 750 THz, electromagnetic — visible light, from red to violet
30 PHz, electromagnetic — x-rays
300 EHz and above - gamma rays

[edit] 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

[edit] 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