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Canon VIXIA Series AVCHD and HDV Camcorders
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Old November 27th, 2007, 06:47 AM   #1
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Rode Stereo VideoMic with HV20

I love my Rode Stereo VideoMic.

But I cannot use it with HV20 (on camera) because it picks up motor noise.
Outdoors is not as bad as indoors, but nevertheless.

I failed to fix it in post in Vegas.
It gets better, but I can still hear the noise.

I was wondering if somebody got around this problem.

I have Rode NTG-2 too, but I would like to use Stereo VideoMic sometimes as well.

Thanks
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Old November 27th, 2007, 12:59 PM   #2
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Is the objectionable motor noise mainly when using audio AGC?
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Old November 27th, 2007, 05:36 PM   #3
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I mostly use manual mike levels, but it's present with AGC too (of course).

The problem is wide pickup pattern of Stereo VideoMic I guess.

I don't hear any motor noise when using NTG-2.
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Old November 28th, 2007, 09:59 AM   #4
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Using AGC mode can make the noise more noticeable by raising the background noise levels during quieter portions of program material.
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Old November 28th, 2007, 05:54 PM   #5
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I am aware of it.
;-)

I checked some footage yesterday.
After noise reduction in post the noise is barely noticable when shot outside.
I am checking in headsets - I guess I am to picky.

For indoor footage when it's quiet, I can hear the noise
Will try to do noise reduction
;-(
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Old November 29th, 2007, 09:52 AM   #6
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Head phones tend to make noise more apparent because they close couple sound to the ear, and isolate the ear from ambient room noise. best to make a final noise judgment in a normal listening/viewing environment.

Here is a simplified analysis of this.
1. The typical noise level in a room in a home is around 50 db SPL.
2. The best noise isolation headphones (e.g.,used by drummers) may provide as much as 29 dB of sound isolation. Lets assume typical head phone provide 15 dB of isolation from ambient room sound.
3. Lets assume the recording signal to noise level is 45 dB.
4. If the program material listening level is set to 90 dB SPL, the noise is at about 45 dB SPL, about 5 dB below ambient room noise level and not very noticeable.
5. If listening with headphones at the same program level, the noise is still at 45 dB SPL, but the room ambient is now at 35 dB SPL thanks to the isolation, and it no longer masks the recording noise level - the recorded as become dominant.
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