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...y is 25 Hz, the frequencies of the harmonics are: 25 Hz, 50 Hz, 75 Hz, 100 Hz, etc.

...ertz (Hz), named after the German physicist Heinrich Hertz. For example, 1 Hz means that an event repeats once per second.

...ies]] in the range 30 petahertz to 30 exahertz (3 × 10/16 Hz to 3 × 10/19 Hz) and energies in the range 120 eV to 120 keV. They are shorter in waveleng

...00 Hz and the human ear is most sensitive to frequencies around 1000-3,500 Hz. Sound above the hearing range is known as [[ultrasound]], and that below t

It is widely [[accepted]] that patterns of neural firing, measured in Hz, [[correspond]] with states of alertness such as [[focused]] [[attention]],

...physical (possibly why video movie frame rates were based on a minimum 24 hz i.e. frames per second).

*Received by HZ 4-4-08 *HZ 4/6/08:

...For example, the now-standard tuning [[pitch]] for most Western music, 440 Hz, is named a′ or A4. There are two formal ways to define each note and oct

...audible sound has a very wide frequency range (from 20 to about 17000 Hz), and thus a very wide range of wavelengths (from about 20 mm to 17&nb

...images per second - permitting one to see the flicker of the European 50[[Hz]] TV images). Elements of the visual field are thus grouped automatically a

...plainly, if the stimulus is 5 Hz the resulting measured EEG will show a 5-Hz frequency-following response using appropriate time-domain averaging protoc