how's this so far?

nadams
nadams Posts: 5,877
edited February 2024 in Clubhouse Archives
Guys and gals,
I'm putting together a website that explains how a speaker works. Is it accurate so far? Here's what I've got-

Click Here
Ludicrous gibs!
Post edited by RyanC_Masimo on
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  • scottvamp
    scottvamp Posts: 3,277
    edited April 2003
    Bored???
    There is the magnet and it has + and - sent to it and it sucks that cone thingy back and forth on the spider thingy moves over the voicecoil thingy. Ya!!!
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  • nadams
    nadams Posts: 5,877
    edited April 2003
    Not bored.... school project :lol:

    nadams
    Ludicrous gibs!
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  • HBombToo
    HBombToo Posts: 5,256
    edited April 2003
    I always thought that little people live inside the boxes and they need fed so thats why you hook them up to those boxes with all the lights and dials. 1 line sends food the other takes away the trash and the more food you send the louder they sing. The more expensive a speaker is the higher quality the midgets in the box!

    Please help me I'm so confused over here.....

    HBomb
    ***WAREMTAE***
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  • RuSsMaN
    RuSsMaN Posts: 17,986
    edited April 2003
    Midgets.

    Proof that God has a sense of humor.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.
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  • VR3
    VR3 Posts: 28,788
    edited April 2003
    I did a project on speakers, 10 pages long. Only had to be 4, but someone said I couldnt write a 10 pager. lol! Well I read the page you are summarizing and did my own summary. Pretty simple, I don't know where my paper is though! Ohh well!
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • Tour2ma
    Tour2ma Posts: 10,177
    edited April 2003
    Originally posted by HBombToo
    I always thought that little people live inside the boxes...
    :lol::lol::lol:
    Good one, but I think we could be a little more constructive here.

    nadams,
    Not bad, There are a few leaps in your first draft you could shorten up for your less knowledgable readers like HBomb. :D

    2nd Paragraph
    Good point with the Sound waves analogy to ocean waves. "Frequency" is measured in hertz, as you state at the end, not cycles as you mention mid paragraph. 1 Hertz (Hz) = 1 cycle per second (cps)

    4th P
    First, the "large, powerful magnets" are permanent magnets.
    As for electromagnets, the way they work is that when a DC voltage potential is applied across a wire a current is induced. When a DC current is induced in a coiled wire a magnetic field results. When this electromagnet lies within a permanent magnet’s magnetic field, its attraction, or repulsion occurs.
    Whether the coil is attracted to or repulsed by the permanent magnet depends on its polarity relative to the permanent magnet (as you mention likes repel while opposites attract), which is dependant upon the direction the current is flowing which is in turn dependant upon the application of a positive or negative voltage potential.

    5th P
    Correct that a woofer cannot move fast enough to reproduce higher than a certain frequency, but why can't it? Answer: Its mass is too great. Gets into momentum and inertia, which may be deeper than you want to go, but if you want to go there, look up the terms and take a crack at including them and repost the updated write up for further review.
    As for the reason why tweeters can't reproduce a 20 Hz signal, it does end up at distortion, or destruction, but again the question is left as to why? In fact, tweeters can vibrate slowly enough, but they are so small that they cannot produce low frequency signals with enough amplitude (the height of the wave) to be audible. This gets into the creation of audible sound pressure level (spl), or decibels (db) and the volume of air a driver can displace in a cycle. Air displacement is a function of a driver’s surface area and "throw", or the distance it can travel. If you apply a voltage potential of a 75 db 20 Hz signal to a 1” tweeter it will try to move far enough to reproduce the tone, and in doing so will self-destruct.
    Ditto for 4” to 6”mid-range drivers… ah, but with their size the designer is within reach of a way around their limitation. They can employ multiple drivers in an array sharing the low frequency duties (sound familiar?).

    6th P
    You need Russ or one of the DIY speaker guys to help here on how crossovers work. Beyond the fact that they attenuate the music signal to the various drivers, I can’t get you there. I'm a little more at home with Physics than I am Circuits.
    Russ, you posted some good links to crossover design sites a little while ago. They might be useful here.

    So nadams, I think you're on the right track and the above should help you flesh things out a bit... Or it could be there really are little people in there… ;)
    Good luck with your paper...
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "Death doesn't come with a Uhaul." - Dennis Gardner
    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
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