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Discussion board help and admin topics => Half Baked Ideas => Topic started by: nightlife on December 17, 2007, 02:06:45 PM

Title: What will resist a frequency?
Post by: nightlife on December 17, 2007, 02:06:45 PM
 I started this thread to find out what will resist a frequency so we can use it to rub a frequency against to create electric.
Title: Re: What will resist a frequency?
Post by: hansvonlieven on December 17, 2007, 02:23:27 PM
What will resist a frequency?

Any body with a resonant frequency far removed from the frequency in question.

A resonant body will accept energy at its own level of resonance and reject energy far removed from its own level of resonance (standard physics)

Hans von Lieven
Title: Re: What will resist a frequency?
Post by: nightlife on December 17, 2007, 02:32:01 PM
 I am thinking that one frequency will resist another frequency so lets order a frequency from one way and another frequency from the opposite and wrap a wire around them and see what kind of reading we get.
Title: Re: What will resist a frequency?
Post by: hansvonlieven on December 17, 2007, 03:00:01 PM
a frequency can be cancelled by levelling the same frequency at it with a 180 degree phase shift

Hans von Lieven
Title: Re: What will resist a frequency?
Post by: nightlife on December 17, 2007, 07:01:57 PM
hansvonlieven, you mentioned that Keely talked about three vibrating frequencies. Do you think they would resist each other? And if so, do have any idea of what those frequencies are?

I am still trying to soak up your reply from the other thread. It is a bit over my head. LOL
Title: Re: What will resist a frequency?
Post by: nightlife on December 17, 2007, 07:05:09 PM
 I also am wondering if a magnetic field is a frenquecies resistance.
Title: Re: What will resist a frequency?
Post by: mapsrg on December 18, 2007, 02:22:32 AM
Frequency is a wave or a pulse....and everthing has one.Depending on timing some waves travelling in different directions will cancel or partly cancel each other.Its all about phasing of peaks and troughs
Title: Re: What will resist a frequency?
Post by: the_big_m_in_ok on April 02, 2009, 05:43:28 PM
Quote from Hans von Lieven:
"a frequency can be cancelled by levelling the same frequency at it with a 180 degree phase shift"

>>"A band-pass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range."
quoted from:
http://en.wikipedia.org/wiki/Band-pass_filter

A high pass filter stop let all but the higher frequencies than the target frequency through (let them pass).
The low pass filter will do the opposite.

Wikipedia should have examples of the math needed to figure the frequencies.


A band-stop filter will all allow all but a narrow band or frequencies through (notch filter).
The thread starter, nightlife, may have been looking for a band-stop filter.



http://ecelab.com/band-stop.htm

...had the basics for notch filters.



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