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Thread: Logitech "noise-cancelling" microphone

  1. #11
    Raw Wave rando's Avatar
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    I was just thinking about the same thing based on the picture of the guts in the other threads. I noticed the vents in front/back of these and assumed that those combined (perhaps) with the enclsoure were the 'special' noise cancelling feature.

    As far as active noise canceling ... I'm not sure why you'd ever need it anyhow. Seems like the PC would be more than capable of doing this on its own.

    @0l33l: You say this mic performs much better than the others in a quiet environment. How about in a noisy one like a car? In a car with the stereo blasting? With the windows down at 80mph?

  2. #12
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    I can answer that. Windows down -forget it. Wind noise on the mic, at least where I've mounted it.

    Stereo on, it can recognize voice commands. Stereo blasting, nope.

    But I don't think that's so bad. I can't hear my passengers when the stereo's blasting. It doesn't seem like I ought to expect the computer to, either.

    It would be great if there was some way to filter or process the sound to listen only to the range of your voice and then to try and filter out extraneous noises like car rumble or wind noise. I know how to do it in a post-processing environment but haven't ever heard of it being done in real time for voice.

    I'll record some audio from my Logitech install while on the road and post it so you can hear the noise.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
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  3. #13
    Variable Bitrate lastberserker's Avatar
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    Quote Originally Posted by electron
    Btw, for anyone wondering what is one of the best microphones out there for VR, then Acoustic Magic is the answer, but I can't imagine one of those units in a car, eventho they advertise for automotive use as well, not to mention they are VERY pricey (and yes I did own one of these for a while)

    http://www.acousticmagic.com/
    No, this is exactly what you don't want in the car with a driver (obviously ) and several passangers - suddenly your carputer starts picking up random commands from their dumb chatter Uni-directional mike sounds like a much better idea to me; given a good setup it might even solve the problem of wind noise and blasting music.
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  4. #14
    FLAC evandude's Avatar
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    I just downloaded some noise test signals from http://www.dogstar.dantimax.dk/testwavs/

    seems like i'm getting half-decent recognition with these mics, with "brown noise" in the background. However, that doesn't exactly prove anything. I never actually did "voice training" with my old mic, and I notice recognition goes up a LOT with that having been done with these mics, so I will have to do the training in the car and see how that goes

  5. #15
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    I did a *lot* of voice training. By the end, I could pretty much talk at normal speed and it would recognize everything I said.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
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  6. #16
    My Village Called 0l33l's Avatar
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    Quote Originally Posted by rando
    @0l33l: You say this mic performs much better than the others in a quiet environment. How about in a noisy one like a car? In a car with the stereo blasting? With the windows down at 80mph?
    Well, when testing out NaviVoice, I'm usually listening to rap. It picks up the stuff in the speakers, but it doesn't recognize it.

  7. #17
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    Here's audio I recorded (1.5 meg mp3) while driving in the car from the microphone location discussed in this thread

    You can hear road noise as I drive faster but can still hear my voice clearly as well. Of course, I don't have the stereo on or the window open.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

  8. #18
    My Village Called 0l33l's Avatar
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    Quote Originally Posted by Bugbyte
    Here's audio I recorded (1.5 meg mp3) while driving in the car from the microphone location discussed in this thread

    You can hear road noise as I drive faster but can still hear my voice clearly as well. Of course, I don't have the stereo on or the window open.
    Great quality mp3!

    My guess is that SAPI automatically filters out those frequencies. It just takes up CPU time.

  9. #19
    FLAC evandude's Avatar
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    Sounds very good. What are you using to record? I got SA2k5 to do pretty good voice recognition (just on my desk, not in the car yet) but when I used windows sound recorder i couldn't even hear my voice in the recording unless I put the microphone almost in my mouth... Still haven't figured that one out...

  10. #20
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    I was using sound recorder, the one that comes with Windows. Must be the volume setting for your microphone.
    Quote Originally Posted by ghettocruzer View Post
    I was gung ho on building a PC [until] just recently. However, between my new phone having internet and GPS and all...and this kit...Im starting to have trouble justfiying it haha.
    Want to:
    -Find out about the new iBug iPad install?
    -Find out about carPC's in just 5 minutes? View the Car PC 101 video

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