[VoIP] 2600 Dial Pulse

[Peter Duffield]

Hi Mark

(from Wikipedia) ....

The SI unit hertz (Hz) was established in his honor by the IEC in 1930 for
frequency, a measurement of the number of times that a repeated event occurs
per unit of time (also called "cycles per sec" (cps)). In 1969 (East Germany),
there was cast a Heinrich Hertz memorial medal. The IEEE Heinrich Hertz Medal,
established in 1987, is "for outstanding achievements in Hertzian waves [...]
presented annually to an individual for achievements which are theoretical or
experimental in nature". It was adopted by the CGPM (Conférence générale des
poids et mesures) in 1964.

Peter



On Thu, 10 Jan 2008 19:32:13 -0500, Steph Kerman <stfkerman at jps.net> wrote:

>I started to encounter it around the mid-60s.  I think that's 
>approximately when it was adopted.
>
>Steph
>
>Mark Rudholm wrote:
>> Indeed, when was that?  When I went to EE school in the 80s
>> the transition to Hertz had already happened.  In fact, I didn't
>> see "CPS" until a while later.
>>
>> Tangentially, I thought it was amusing to see people write
>> 1 Hert or 1 Megahert, as if "Hertz" was the plural of "Hert".
>> Peter Duffield wrote:
>>   
>>> Hi Jayson
>>>
>>> The SI unit for frequency is the Hertz, which is named after the German
>>> physicist Heinrich Hertz.  The correct way to refer to it in writing is 
>>> 2600 Hz.  
>>>
>>> It meant so much more before they started naming International Standard units
>>> after notable people - cps or cycles per second was clear, concise, and to the
>>> point, and left nothing to the imagination.
>>>     
>>
>>
>>   
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