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    Day 6: More NH references...

    Ace
    Ace
    Ace
    NH Noble Member
    NH Noble Member

    Number of posts : 4361
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    Registration date : 2010-03-18
    Mood : Day 6: More NH references... Cool
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    20100818

    Day 6: More NH references... Empty Day 6: More NH references...

    Post by Ace

    From my FACS class, apparently I can join an organization called FCCLA. It means Family something something Leaders of America...Anyway, their motto is "Toward New Horizons". IT MUST BE ANOTHER SIGN!

    History is actually gonna be an okay class...and Lit will totally suck.

    I made two more homies in ABCA. Very Happy

    I listen to my iPod through some of the school day, and I noticed today that my earphones are magnetic. Is that normal?

    Grades:

    Geometry: --
    History: 100
    FACS: --
    Lit: 95
    PE: --
    ABCA: 100
    Biology: 100
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    Craig

    Post Wed Aug 18, 2010 5:46 pm by Craig

    Yes, some earphones are made magnetic...
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    Ace

    Post Wed Aug 18, 2010 5:58 pm by Ace

    It's the metal grating that covers the actual sound-making stuff that's magnetic... and the plastic/rubber thing that covers the metal grating negates all the magnetism. So what's the point?
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    Ahmed

    Post Wed Aug 18, 2010 6:04 pm by Ahmed

    It becomes magnetic because of the sound waves
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    Ace

    Post Wed Aug 18, 2010 6:10 pm by Ace

    They're still magnetic when they're unplugged. And the earphones repel each other.
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    The Banker

    Post Wed Aug 18, 2010 7:51 pm by The Banker

    yup.. something to do with electromagnetic fields mate...
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    Ahmed

    Post Wed Aug 18, 2010 7:56 pm by Ahmed

    No lol. They are just magnetic
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    The Banker

    Post Wed Aug 18, 2010 8:02 pm by The Banker

    The moving coil driver, more commonly referred to as a "dynamic" driver is the most common type used in headphones. The operating principle consists of a stationary magnetic element affixed to the frame of the headphone which sets up a static magnetic field. The magnetic element in headphones is typically composed of ferrite or neodymium. The diaphragm, typically fabricated from lightweight, high stiffness to mass ratio cellulose, polymer, carbon material, or the like, is attached to a coil of wire (voice coil) which is immersed in the static magnetic field of the stationary magnet. The diaphragm is actuated by the attached voice coil, when an audio current is passed through the coil. The alternating magnetic field produced by the current through the coil reacts against the static magnetic field in turn, causing the coil and attached diaphragm to move the air, thus producing sound. Modern moving-coil headphone drivers are derived from microphone capsule technology.

    http://en.wikipedia.org/wiki/Headphones

    u have a magnetic field and a current... electromagnetic, no?
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    Ahmed

    Post Wed Aug 18, 2010 8:10 pm by Ahmed

    The headphone is made out of magnet as I said. Magnets form magnetic field.
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    The Banker

    Post Wed Aug 18, 2010 8:13 pm by The Banker

    and u have an electric current..
    magnets+electricity=electromagnetic

    i was never good at physics Very Happy
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    Ahmed

    Post Wed Aug 18, 2010 8:42 pm by Ahmed

    We were talking about the material that the headphone was made of...not what it makes.
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    The Banker

    Post Wed Aug 18, 2010 8:43 pm by The Banker

    my bad..
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    Dark Flame99966

    Post Wed Aug 18, 2010 9:33 pm by Dark Flame99966

    All earphones should be. But also: Confirmation Bias
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    Ace

    Post Wed Aug 18, 2010 9:56 pm by Ace

    Pink Panther wrote:
    The moving coil driver, more commonly referred to as a "dynamic" driver is the most common type used in headphones. The operating principle consists of a stationary magnetic element affixed to the frame of the headphone which sets up a static magnetic field. The magnetic element in headphones is typically composed of ferrite or neodymium. The diaphragm, typically fabricated from lightweight, high stiffness to mass ratio cellulose, polymer, carbon material, or the like, is attached to a coil of wire (voice coil) which is immersed in the static magnetic field of the stationary magnet. The diaphragm is actuated by the attached voice coil, when an audio current is passed through the coil. The alternating magnetic field produced by the current through the coil reacts against the static magnetic field in turn, causing the coil and attached diaphragm to move the air, thus producing sound. Modern moving-coil headphone drivers are derived from microphone capsule technology.

    http://en.wikipedia.org/wiki/Headphones

    u have a magnetic field and a current... electromagnetic, no?

    TOO MANY BIG WORDS. I think my brain imploded.
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