On 06/11/2010, at 6:45 PM, stwebvanuatu wrote:
> Hello again,
>
> Thanks for the many useful responses to my handling noise problem.
> I have now uploaded some files to this group. I didn't make a
> folder and you'll have to scroll down to find them in the list
> (which is alphabetical):
>
> noise1gain10, noise2gain10hpf, noise3gain5 were all recorded indoors
> recording1 is a field recording with maximum gain. The mic was in
> the same shock mount. I braced my arm against a tree to try and
> stabilise the mic.
> recording2 is another field recording, but this time I am trying to
> hold the mic steady at maximum gain.
Stephen,
The low rumbles you are hearing in your recordings are definitely NOT
normal. I will leave it to someone else to suggest what might be
causing this severe case of low rumbling handling noise. Can you
post a photo of your setup, showing how you have the mic lead
routed? Is any part of the microphone touching the windshield? And
indeed, are you using a windshield?
Vicki
>
> Are these normal noise responses? Even the one at 50% gain?
>
> What I'm thinking now is, like someone had commented, the ME67 is
> too 'hot'. It's very sensitive, particularly towards low
> frequencies and it's front heavy and makes hard work for the shock
> mount. I think it may be rather impractical for a walkabout mic?
>
> I checked the noise spectrum in the top three files and the peaks
> are rather consistent. The highest frequency noise peak was 40 Hz.
>
> I previously used an Audiotechnica 835b mic, which was good
> enough , until I dropped it in a creek! I started out holding the
> AT835b in my hand, with the HPF on to reduce handling noise. I
> later put it in a shockmount and was getting clean recordings with
> the HPF off. That's why I was surprised when I experienced handling
> noise problems with the ME67, right from the start. I wish that I
> could borrow another Sennheiser to compare with mine, with the same
> shock mount and recorder.
>
> Sennheiser ME67 sensitivity =3D 50 mV ~ -26 dB
> AT835b sensitivity =3D 11.2 mV ~ -39 dB
>
> Stephen.
>
>
>
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