Douglas,
Meant to ask what recorder are you using for these tests? Unless you are =
using a SD7 series or equivalent the preamp noise floor will degrade the se=
lf-noise performance of the MKH8070, whereas the higher output of the MKH40=
makes it far less demanding on preamp quality.
cheers
Paul
On 22/06/2011, at 3:32 PM, frozensounds wrote:
> Hi David,
>
> Not quite up to anechoic chamber standards, but under several duvets here=
are the spectrum plots:
>
> http://www.donaldingram.com/Audio/8070vs40spectrum.jpg
>
> An mp3 raised to -3dBfs that illustrates the different noise shapes is he=
re
>
> http://www.donaldingram.com/Audio/L8070R40.mp3
>
> and the orignal file here:
>
> http://www.donaldingram.com/Audio/rawL8070R40.WAV
>
> It's going back to B&H tomorrow.
> It may be a one off below spec mic, but I think I will hang fire getting =
a replacement until I hear more field reports from others.
>
> All the MKH 80X0 series seem to have slightly worse noise than the older =
MKH X0 mics.
> I wonder if they have taken miniaturization too far and traded off induct=
or Q or PLL phase noise to get the size down.
> It would be interesting to see schematics of the new mics.
>
>
> --- In "Avocet" <> wrote:
>>
>
>> The power spectrum of my MKH mics have a tipup at the upper end which
>> is getting close to thermal noise. I can spot this on many recordings
>> where the noise is inaudible. Can you do a power spectrum of the 8070
>> noise or post a noise recording so I can compare it? I record HF
>> noise with the mic under a pile of bedclothes.
>>
>> David
>
>
>
>
>
> ------------------------------------
>
> "While a picture is worth a thousand words, a
> sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.
>
> Yahoo! Groups Links
>
>
>
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