Hertz
n 1: the unit of frequency; one Hertz has a periodic interval of
one second [syn: {Hertz}, {Hz}, {cycle per second}, {cycles/second},
{cps}, {cycle}]
2: German physicist who was the first to produce
electromagnetic waves artificially (1857-1894) [syn: {Hertz},
{Heinrich Hertz}, {Heinrich Rudolph Hertz}]
Some well-known hz:
The frequency generated by old captain crunch whistles and blue boxes. Allowed access to the trunk signalling on old trunk phone lines. This isn't possible on modern trunks, which are moving to CCITT SS7 signalling, which doesn't involve hz at all.
| 1 697 1209 | 2 697 1336 | 3 697 1477 | A 697 1633 |
| 4 770 1209 | 5 770 1336 | 6 770 1477 | B 770 1633 |
| 7 852 1209 | 8 852 1336 | 9 852 1477 | C 852 1633 |
| * 941 1209 | 0 941 1336 | # 941 1477 | D 941 1633 |