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Philips Active Noise Canceling Headphones, SHN2500 OEM - SHN2500-B ???

Discussion in 'Electronic Repair' started by mm, Sep 11, 2009.

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  1. mm

    mm Guest

    Are these actually active noise cancelling, or even noise cancelling
    at all?

    http://www.buy.com/prod/philips-act...n2500-oem/q/loc/111/208722231.html?adid=17992

    Their list price is only 30 dollars.

    I thought to be noise cancelling, there had to be a microphone that
    listened to background noise and a circuit that reversed the noise and
    simultaneously played it through the speakers or earphones.

    It's not just on this shlocky website that I see the term used to
    mean, afaict, "fills your ear canal so the noise can't get it". Or do
    they do more than that.

    Thanks.
     
  2. iws

    iws Guest

    | Are these actually active noise cancelling, or even noise cancelling
    | at all?
    |
    |
    http://www.buy.com/prod/philips-act...n2500-oem/q/loc/111/208722231.html?adid=17992
    |
    | Their list price is only 30 dollars.
    |
    | I thought to be noise cancelling, there had to be a microphone that
    | listened to background noise and a circuit that reversed the noise and
    | simultaneously played it through the speakers or earphones.
    |
    | It's not just on this shlocky website that I see the term used to
    | mean, afaict, "fills your ear canal so the noise can't get it". Or do
    | they do more than that.
    |
    | Thanks.
    |
    Yes, they will have some sort of active noise cancelling circuitry with a
    microphone. It's all in the separate module shown next to the ear pieces.
    How well it works is another story but the reviews for this model seem
    pretty positive.
     
  3. mm

    mm Guest

    Wow. That's amazing. Thanks.

    (I am not going to shop anymore at buy.com, however. Too many
    problems.)
     
  4. iws

    iws Guest

    |
    | >| >| Are these actually active noise cancelling, or even noise cancelling
    | >| at all?
    | >|
    | >|
    | | >|
    | >| Their list price is only 30 dollars.
    | >|
    | >| I thought to be noise cancelling, there had to be a microphone that
    | >| listened to background noise and a circuit that reversed the noise and
    | >| simultaneously played it through the speakers or earphones.
    | >|
    | >| It's not just on this shlocky website that I see the term used to
    | >| mean, afaict, "fills your ear canal so the noise can't get it". Or do
    | >| they do more than that.
    | >|
    | >| Thanks.
    | >|
    | >Yes, they will have some sort of active noise cancelling circuitry with a
    | >microphone. It's all in the separate module shown next to the ear pieces.
    | >How well it works is another story but the reviews for this model seem
    | >pretty positive.
    |
    | Wow. That's amazing. Thanks.
    |
    | (I am not going to shop anymore at buy.com, however. Too many
    | problems.)
    | >
    Actually, I've bought a few things from buy.com and been pleased with the
    service and products. However, I think they have a large number of actual
    stores that deliver the merchandise so that may be where the variability
    arises. On the earphones, they're only $9.99 with free shipping - hard to go
    wrong.
     
  5. Well, maybe not -- not for the $9.99 SKU. I took a gamble at buying two
    sets of these to replace the bulky earmuff-style noise cancelling
    earphones that my wife and I use on long airplane flights.

    I guess I'm only out $20.

    The whole kit comes in a poly bag -- no box. It came only with _one_
    set of ear cups. These are obviousy returned or 're-fubished' items.
    (How do you "refurbish" things like this?) Neither set seems to do much
    noise cancelling. What they do do .. they amplify the audio when
    switched "On". Maybe the intent is to over-power the external noise --
    thus driving my poor hearing to an even sorrier state....

    I see the web site no longer has this $9.99 SKU. They do have a $22.99
    SKU that seems to be the full Philips kit -- with box and everything!
    :)

    Anyway, I guess I'm only out $20.

    Jonesy
     
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