This redirect is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of
Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
This article is within the scope of
WikiProject Spectroscopy, a project which is currently considered to be inactive.SpectroscopyWikipedia:WikiProject SpectroscopyTemplate:WikiProject SpectroscopySpectroscopy articles
Wrong example?
The example shows a sine wave and then shows a spectrum with three frequency components?
Also, we should do the continuous case first, either with a continuous fourier transform or a fourier series of a simple three-component signal or something. —
Omegatron00:58, 5 December 2005 (UTC)reply
The "color"
I changed the effect is the "color" white to the color of the light is white. Just making a note of this here because I am a n00b to fourier stuff and may have missed some subtlety. The only way I could understand the quote marks, though, was as meaning "metaphorically but not actually white". Surely we're talking (for the moment) about actual light which is actually white so the quote marks just introduce confusion.
213.122.22.138 (
talk)
14:42, 20 March 2010 (UTC)reply
Ah, yes, I see you tagged it. But you didn't start a merge discussion to give the rationale; neither did anyone else. I'd say either start the discussion, or if you think lack of opposition is enough, just go ahead and merge.
Dicklyon (
talk)
06:40, 13 October 2014 (UTC)reply
Different fields have different names for the same or similar concepts. In the audio world, "Frequency spectrum" is a more common term than "power spectrum" or "spectral density"- Gscholar gives
40K hits for audio "frequency spectrum"
26.7K hits for audio "power spectrum"
30.9K hits for audio "spectral density"
And although it is harder to measure, I would expect "frequency spectrum" to be even more common in the popular press. Broadcasting also uses the term "frequency spectrum", but for a different purpose.
This article is mostly about the audio version, with unsourced light and radio sections thrown in (those two could be deleted, or merged somewhere else). It could be renamed to
Frequency spectrum (acoustics) to indicate this article is mostly about the audio concept. As an article, start class is about right--it provides a nice gentle introduction to the concept and some nice examples, but has inadequate sourcing and citations. It could be expanded with better references and some more examples and technical material later in the article.
I can understand
Fgnievinski wanting to merge material from this article into
Spectral density; that article is completely inadequate as an introduction to the concept. A reader who encounters the term "frequency spectrum" for the first time, maybe in a music class or playing around with a graphic equalizer, and wants to know what it is all about, will hit a brick wall when confronted in the first paragraph in the lead with concepts like
measure theory,
cumulative distribution function and
absolute continuity. I added some example images there to make it more accessible, but it was lipstick on a pig. The
Spectral density article needs restructuring per
WP:EXPLAINLEAD and
WP:UPFRONT, with introductory material and examples/applications near the top and the heavy math sent to the latter part of the article. --
Mark viking (
talk)
18:33, 13 October 2014 (UTC)reply
Shall we outline what sections ideally this introductory article would have? I'm not sure how far back into the
Fourier transform theory we'd like to explain. On the other hand, although a more practical, less abstract introduction would be desirable, we don't want just an
Introduction to spectral density estimation. Again, I think that any of "spectral density", "Fourier space", or "Fourier spectrum" would convey the idea that we're not talking only about the independent variable (
frequency domain).
Fgnievinski (
talk)
01:42, 14 October 2014 (UTC)reply
This redirect is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of
Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join
the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
This article is within the scope of
WikiProject Spectroscopy, a project which is currently considered to be inactive.SpectroscopyWikipedia:WikiProject SpectroscopyTemplate:WikiProject SpectroscopySpectroscopy articles
Wrong example?
The example shows a sine wave and then shows a spectrum with three frequency components?
Also, we should do the continuous case first, either with a continuous fourier transform or a fourier series of a simple three-component signal or something. —
Omegatron00:58, 5 December 2005 (UTC)reply
The "color"
I changed the effect is the "color" white to the color of the light is white. Just making a note of this here because I am a n00b to fourier stuff and may have missed some subtlety. The only way I could understand the quote marks, though, was as meaning "metaphorically but not actually white". Surely we're talking (for the moment) about actual light which is actually white so the quote marks just introduce confusion.
213.122.22.138 (
talk)
14:42, 20 March 2010 (UTC)reply
Ah, yes, I see you tagged it. But you didn't start a merge discussion to give the rationale; neither did anyone else. I'd say either start the discussion, or if you think lack of opposition is enough, just go ahead and merge.
Dicklyon (
talk)
06:40, 13 October 2014 (UTC)reply
Different fields have different names for the same or similar concepts. In the audio world, "Frequency spectrum" is a more common term than "power spectrum" or "spectral density"- Gscholar gives
40K hits for audio "frequency spectrum"
26.7K hits for audio "power spectrum"
30.9K hits for audio "spectral density"
And although it is harder to measure, I would expect "frequency spectrum" to be even more common in the popular press. Broadcasting also uses the term "frequency spectrum", but for a different purpose.
This article is mostly about the audio version, with unsourced light and radio sections thrown in (those two could be deleted, or merged somewhere else). It could be renamed to
Frequency spectrum (acoustics) to indicate this article is mostly about the audio concept. As an article, start class is about right--it provides a nice gentle introduction to the concept and some nice examples, but has inadequate sourcing and citations. It could be expanded with better references and some more examples and technical material later in the article.
I can understand
Fgnievinski wanting to merge material from this article into
Spectral density; that article is completely inadequate as an introduction to the concept. A reader who encounters the term "frequency spectrum" for the first time, maybe in a music class or playing around with a graphic equalizer, and wants to know what it is all about, will hit a brick wall when confronted in the first paragraph in the lead with concepts like
measure theory,
cumulative distribution function and
absolute continuity. I added some example images there to make it more accessible, but it was lipstick on a pig. The
Spectral density article needs restructuring per
WP:EXPLAINLEAD and
WP:UPFRONT, with introductory material and examples/applications near the top and the heavy math sent to the latter part of the article. --
Mark viking (
talk)
18:33, 13 October 2014 (UTC)reply
Shall we outline what sections ideally this introductory article would have? I'm not sure how far back into the
Fourier transform theory we'd like to explain. On the other hand, although a more practical, less abstract introduction would be desirable, we don't want just an
Introduction to spectral density estimation. Again, I think that any of "spectral density", "Fourier space", or "Fourier spectrum" would convey the idea that we're not talking only about the independent variable (
frequency domain).
Fgnievinski (
talk)
01:42, 14 October 2014 (UTC)reply