Talk:Hertz
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[edit] Hz of Food and Liquids
Is it possible to measure the Hz of liquids, food stuffs, and is a lower or higher reading preferable in health terms? Some nutritional products claim to have a higher Hz and are therefore better - is this a scam?
- The term Hertz as described in this article is just a definition of inverse time, e.g. the number of times something happens in a second. The term Hertz does get used in Essential Oils and other health supplements, on the basis that the brain (or entire body) has an operating electrical frequency, and that if that frequency becomes too low you die - if you have a high frequency, you are better off. In my opinion, these tend to be a bit hocus-pocus - there are loads of frequencies you can measure from the body and it's easy to make a spurious measurement. As for food 'adding' to that frequency, hmm... Here's a page which takes it all seriously though: http://www.webdeb.com/oils/frequency.htm Tomisaac 13:17, 25 May 2006 (UTC)
[edit] Megahertz and Kilohertz pages
Can the pages Megahertz, Kilohertz etc be more than stubs?
Should we redirect them here, where we can put a list of SI multiples? -- Tarquin
- No. I think we should also have picohertz, yottahertz etc. Just kidding. It might be useful think about consolidating all these SI pages so that the article is at the preferred SI standard with all the other prefixed stuff redirecting to it. Hm. That would mean that gram would redirect to kilogram, kilometre to metre, square kilometre to square metre etc. --mav
- Megahertz should be left as-is, whereas the rest (e.g. Kilohertz) should simply be merged into Hertz.
maybe there should be a page like Orders of magnitude (power). Yonir 00:46, 27 August 2005 (UTC)
[edit] Terahertz
I think the 'terahertz' search shouldn't be redirected to this page because this term is more likely used to describe the band of frequency between microwave and infrared. It should be pointed to http://en.wikipedia.org/wiki/T-rays instead. I admit that terahertz is a short for terahertz radiation, but as i'm working in this field, we usually call it 'terahertz'.
- I second this, and would like to add T-wave to the list that should go to T-rays instead of Hertz. I hear there's a wikipedia principle saying "be bold", so I'm going to make the changes seeing as the original links are 3 years old. Oooh, I see someone has already made the change for 'terahertz'. 99.225.158.180 (talk) 16:45, 10 March 2008 (UTC)
[edit] Audio frequency ranges
I noticed that frequency ranges were listed for visible light, but only a few select audio frequencies were listed. Might it be useful to note that the range from roughly 20Hz to roughly 16KHz covers the ability of the human ear to distinguish sounds? Or even note the higher ranges (or lower) used by other animals (dogs, whales, etc)?
-- T.Moore
- Good suggestion; thanks! I'll see to it. --Wernher 22:35, 2 Jul 2004 (UTC)
[edit] Hz and human range of hearing
Can someone help me understand why dog whistles are considered 'silent' (as in beyond the range of human hearing) when most of them are (at about 5800 Hz) well within the range of audible sound (20Hz - 16kHz) for human hearing? Thx.
-
- Because the maximum human ear performances are in the middle frequencies. A sound as treble as 6kHz has to be quite loud for you to clearly hear it.
[edit] Capitals and lower case
Anybody know why in "kHz", the "k" is lower case, whereas in "MHz" the "M" is upper?
DanielVonEhren 21:46, 25 Jan 2005 (UTC)
- The SI system of numbers has k (or kilo) as the prefix for 1000, m (or micro)as the prefix for a millionth and M (or Mega) as the prefix for a 1,000,000. So that MHz is 1,000,000 Hz and mHz is 1/1,000,000Hz. See Kilo. Tiles 06:31, 27 Jan 2005 (UTC)
- Common usage has capital K for kilo in all sorts of scientific uses, to conform to a 'nonstandard' of capitals=greater, lowercase=lesser. I always thought the unit name spelled out was capitalised 'Hertz', but I was wrong. – Rich 22:16, 29 September 2005 (UTC)
- This made me scream, even moreso that nobody has pointed out the error. m is milli, not micro and is for a thousandth. micro is denoted by a mu. Capubadger 11:39, 28 February 2007 (UTC)
Excellent! The Kilo page has all sorts of things I'd looked at all my life, but never really saw. Thanks Wellington (great place, by the way).
DanielVonEhren 05:35, 28 Jan 2005 (UTC)
To my knowledge, capital K is used in the binary system to indicate 1024. So kilobyte, Kb for short, is 1024 bytes, not 1000. Sven De Coster
- as far as I know, the only standard (although not common) prefix for 1024 is Ki . K is more commonm but not standard. see Binary_prefix for more. -- CyrilB 13:53, 18 April 2006 (UTC)
[edit] ?
Isnt the definition 'one _cycle_ per second' rather than just 'one per second' ?
- No, it is just one per second. --mikeaitch 14:53, September 4, 2005 (UTC)
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- Hertz can measure any repeating event, it does not need to be a wave or cycle. --ssd 03:44, 6 January 2006 (UTC)
[edit] chip speed
Is there a THz chip actually being used in the world today? Also, is it mathmatically possible for a yotta hertz chip to be created?
- Speed of chips are limited by the switching speed of the component semiconductors and the distance the signal travels in a given time. In a Thz, an electron could (very optimistically) travel 3nm, which is close to the size of the width of the traces in some chips. --ssd 03:44, 6 January 2006 (UTC)
[edit] "Deeper explanation"
This section has been moved here so it can be beaten into understandable shape before being re-inserted:
- Hertz (Hz) is a basic a measurement of sound between .001Hz - 20,000+Hz. The lower the hertz, the deeper the level of noise, the higher the hertz, the louder (high-pitched) level of noise. Hertz is also a measurement of high-low noise frequencies forming by the content of the electromagnetism the frequency contains. The amount of content it contains is measured by the abundance of geometric pulsations the frequency holds. Therefore, the higher the pulsations, the more tighter the sound waves are bonded together. The lower the pulsations, the less the waves are bonded. Tight bonds create loud, high-pitched frequencies which do not travel far. Weak bonds create low, sometimes even distorted frequencies that travel further because there would be more sound waves since they would not be bonded together as the tighter bonded waves.
The above is confusing. The "bonding of waves"...I'm just not sure what that's about. Urhixidur 16:24, 2 January 2006 (UTC)
Let me pick apart the errors in this... --ssd 03:57, 9 January 2006 (UTC)
- Sound still exists above 20khz, although human hearing is typicall between 40hz and 15khz, so neither of these numbers (0.001 - 20k) is really relevant.
- "high-low noise" ?? meaningless.
- Noise (as in sound) is not relevant to "electromagnetism"
- Frequencies don't hold "geometric pulsations"
- sound waves are not bonded. Mixed maybe, but not bonded.
- "loud" is a function of amplitude. "high" is a fuction of frequency. The two are independant.
- It is true (for both sound and electromagnetic radiation) that high frequencies are atenuated faster than lower frequencies.
- I am not aware of any special distortion that low frequencies might have, even over long distances.
I think that whole passage is just a bunch of nonsense inserted as a prank. -- M.C.
- Well, if it is a prank, I think it is not funny anymore: I reverted it three times this weekend, and left messages to the anons who put it, but I'm confident it will come back... CyrilB 08:20, 12 June 2006 (UTC)
[edit] Weird coincidence
Herz, as well as being the name of the guy the unit is named after, also happens, by sheer coincidence, to be the German word for "heart." The human heart beats approximately once per second. Linguofreak 03:50, 7 April 2006 (UTC)
- Not quite... the guy is "Hertz". "Heart" is "Herz". I would hazard a guess that "Hertz" (the name) comes from "Herz". But yes, there is a nice coincidence here regarding the human heart rate. — 217.46.147.13 (talk) 15:44, 1 April 2008 (UTC)
[edit] how much?
How much MBs make 1 GHz?
Wrong section bub...
205.202.36.136 13:55, 5 October 2006 (UTC)Mark Davis
[edit] Equivalence to FLOPS
Are the two terms FLOPS and Hertz interconvertable? If so, what is the conversion ratio? Jack · talk · 20:47, Monday, 12 February 2007
- It's like an old piston water pump. Hz is the number of times per second it pulls up a load of water and dumps it. To know how many tons per minute, you must also know how many loads it takes to lift a ton of water. So, your question depends on how many cycles your flopper takes to move a flop, which is at least as variable as the bore of piston pumps. Jim.henderson 00:53, 21 March 2007 (UTC)
[edit] Pronunciation
"gigahertz ... can be pronounced /ˈgigaˌhɝts/, with a hard /g/ sound or /ˈʒɪgaˌhɝts/ or /ˈdʒɪgaˌhɝts/". Really? I've never heard any of these pronunciations in English. Whoever wrote this needs to brush up on their IPA.
- /a/ is the sound of French/Spanish/Italian "a". This phoneme does not exist in English. The symbol required is /ə/ (schwa).
- /ʒ/ is not a "soft g". That is /dʒ/. /ʒ/ is the sound of French "g" before "e" or "i", as in "Gironde".
- /ˈdʒɪgəˌhɝts/ (roughly, "JIG-a-hertz") is rarely used, if ever. That pronunciation might well be a possible variant according to dictionaries, but anyone selling or using computers who used it would just be laughed at.
- /ˌ/ is used for secondary stress. "Gigahertz" has primary stress only. The fact that the vowel in the final syllable is not reduced to /ɚ/ does not mean that there has a secondary stress there. — 217.46.147.13 (talk) 15:29, 1 April 2008 (UTC)
[edit] Add Samples of Common Frequencies?
I thought it might be a good idea to add a section for common/important frequencies, so articles can link to them. For example, I was reading about the ear (why? it's wikipedia for cryin out loud) and it said general audible range is 20 Hz to 20kHz, and I thought "I wonder what those sound like." Now, I have programs to generate the frequency but not everyone does. I can easily make samples for any kind of frequency. And I don't really think another whole page is necessary. Good idea or bad idea?
-- un4v41l48l3 (talk) 03:58, 16 April 2008 (UTC)
[edit] Introduction
The introduction begins with some complicated formulae, and totally put me off hertz when coming to read about it, haha. Why can't articles on this sort of thing be written for the common person, without all the nerdy crap (the intro shouldn't have that). —Preceding unsigned comment added by Finnian9 (talk • contribs) 15:15, 7 June 2008 (UTC)
