Lang & Terry--
Correct, the energy is from very distant cars, trucks and air
traffic. The file is actually made from four, back-to-back segments--
each a slightly different blend. Can you hear the
change/differences? If you can and one tone persists through all
four, there could be something steady going on that didn't detect. If
you cannot clearly hear the change between the sections, a tone could
a dominant frequency in your playback system. I equalized back and
forth between speakers and Sony V600's
The car door slam impulse should provide clues about the resonance--
the tones reinforced by the valley/limestone bluffs. I'm hearing that
the distant machine sounds get some of this tuning too. I'm sure
there's some low Hz noise-resonance in the recording system too, but
its not a huge percentage.
I recorded through the night in Canada with Rich and Greg this
Spring. There was less energy, but still a strong low Hz component.
Rob D.
= = = =
= =
>Rob:
>
>Neat recording. The mid-lows sound very smooth. But I do hear a stuttering
>or pulsating rumble down near 60 Hz. Do you think that is natural, meaning
>not the result of distant internal combustion engines?
>
>I wish I lived way up north where I could get a super quiet winter ambience.
>Around here (Ithaca, New York), there isn't anywhere I can go for a totally
>clean recording. Distant highway or jet noise is always evident when using
>MKH20s. Even when it seems totally quiet, all I have to do is pump the
>volume and I can hear cars or trucks or airplanes somewhere.
>
>Lang
>
>Would something like this work?
>http://www.uwm.edu/~type/Mic%20Preamps/7560EQWinterValleyPres.wav
>(4.6mb)
>
>Minimal presence of a rural valley night equalized for low frequency
>local "air." Car door slam @1000' feet on other side of hill for
>reference. Made with 183's/MD. Rob D.
>
>
>>From: Lang Elliott <>
>>>
>>> It occurs to me that it would be extremely useful to get a totally quiet
>>> ambient recording, perhaps in the far north in dead of winter,
>>>which is free
>>> of animal sounds or other nature sounds, but that has a great spaciousness
>>> and a solid low end that is not contaminated by rumble. One
>>>could filter out
>>> the high end of the recording using a low pass set somewhere below 1 kHz.
>>> Then the resulting recording could be used to mix with
>>>soundscapes where the
>>> low end had to be filtered because of rumble.
>>>
>>> While this is cheating, to a degree, it would add back that deep
>>> spaciousness that is lost when the low end is or reduced.
>>
>>Having wondered around and pointed the SASS/MKH-110 at things, often
>>also the SASS/MKH-20 at the same things my take is the big problem with
>>this idea is that what's down in that low bass in the way of natural
>>sound is not at all the same everywhere. So we are going to have to
>>continue to try and work around the man made noise if we are trying to
>>reproduce a close resemblance of the original site.
>>
>>Note switching back and forth between MKH-110's and MKH-20's will make
>>the MKH-20's sound like they are giving weak bass.
>>
>>This low frequency end supplies more than just spaciousness, it's also a
>>lot of the emotional content of a place. Even the infrasound enters in,
>>we feel it at frequencies well below what our ears can handle.
>>
>>I'll point to the magnaplans I have for speakers for this sort of thing.
>>They can give the low sound you feel without making it too loud.
>>Probably because of their very large flat surface area compared to a
>>focused cone on a regular subwoofer. They still do not reproduce the
>>sound as it was out there, but a lot closer. They won't give that
>>focused thump of a subwoofer cone, but natural infrasound is not focused
>>like that. The funny thing is folks tend to think that they give poor
>>bass as they are so trained to the incorrect bass of cone speakers.
>>
>>Walt
>>
>>
>>
>>
>>
>>"Microphones are not ears,
>>Loudspeakers are not birds,
> >A listening room is not nature."
>>Klas Strandberg
>>Yahoo! Groups Links
>>
>>
>>
>>
>
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>
>
>
>
>
>Yahoo! Groups Links
>To visit your group on the web, go to:
>http://groups.yahoo.com/group/naturerecordists/
>
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>
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><http://docs.yahoo.com/info/terms/> .
>
>
>
>
>
>[Non-text portions of this message have been removed]
>
>
>
>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
>
>
>
>
--
Rob Danielson
Film Department
University of Wisconsin-Milwaukee
________________________________________________________________________
________________________________________________________________________
"Microphones are not ears,
Loudspeakers are not birds,
A listening room is not nature."
Klas Strandberg
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