Hi,
Heres a couple of short clips that demonstrate the swooshing for the locati=
on I recorded in. - Since both rigs captured a similar effect, Id put this =
down to mic placement.
Google map: http://tinyurl.com/nu9f7l
Rode NT4 about 1ft above water - as the wave approaches the tone of the noi=
se changes.
(Diffuse EQ)
http://urlme.net/audio/swoosh-nt4-diff.mp3
No eq:
http://urlme.net/audio/nt4-swoosh-noeq.mp3
(noeq=3D cropping to the section and compressing to mp3)
And similar but not the same time from the Binaural Head:-
http://urlme.net/audio/downtobeachswooshing.mp3
Photo of the head "on location"
http://urlme.net/audio/hv4onlocation.jpg
---
Curt was there a sand bank or rise behind you?
I'll process a video which also demonstrates this effect - video camera was=
placed on top of the dummy head while I panned it around. Should be on you=
tube just as soon as I find the relevant files.
I would imagine in such a diffuse pink noise environment a pair of figure 8=
's may work better?
BR,
Mike.
--- In Rob Danielson <> wrote:
>
> Hi Curt--
> I'm trying to narrow down what you mean by "hollow." By comparing
> files that exhibit the problem with those that don't (or don't as
> much), we'll all probably learn something. I'm wondering if micing
> distance and array used are the only other variables we'd need to
> know,.. Rob D.
>
>
> At 10:08 PM -0500 7/13/09, Curt Olson wrote:
> >I just got back from a long day of serious trial and error in
> >attempting to understand some of the main issues with recording
> >shoreline sounds. I have several hours of audio to study, but here are
> >my two biggest "takeaway" impressions from the day:
> >
> >1) It's been said on this list that mic placement is pretty much
> >everything. That's for sure!
> >
> >2) In rocky surroundings, omnis are much more likely than cardioids to
> >produce the "hollow" sound I was concerned about.
> >
> >This may be old hat to many of you, but it's all new to me, and very
> >educational. Hopefully I can post a clip or two in the next couple days.
> >
> >Curt Olson
> >
> >On Jul 13, 2009, at 3:24 AM,
> ><naturerecordists%40yahoogroups.com>=
com
> >wrote:
> >
> >> 3b. Re: Ocean soundscape, two minutes in the Algarve.
> >> Posted by: "picnet2" <yg%40urlme.net> picnet2
> >> Date: Sun Jul 12, 2009 3:06 pm ((PDT))
> >>
> >> Hello Curt,
> >> Ive found that very close produces a tonal change to the noise
> >> which sounds like a swooshing as the wave approaches. I have over 2
> >> hours of material, some of it is a walk towards the shore and away.
> >> Plus close and *really* close as the head fell in the sea - which
> >> only lasts for 10 seconds until I realized and quickly picked it up,
> >> good job the capsules were water resistant. Gave a whole new meaning
> >> to close micing. I actually liked the sound when the head was
> >> perhaps 1 ft above the waves, walking the shoreline and altering its
> >> position from close to around 6ft above the waves gave a nice
> >> effect. Also turning it as the wave passes by / tracking the wave -
> >> a wet feet affair but well worth it. From around 50 ft the sound is
> >> wider with less sploshing bass from the waves, the capsules Im using
> >> do not seem to pickup the roar associated with some recordings ive
> >> heard, but this is most likely related to different environments. I
> >> also used a prototype hydrophone to capture the same waves (at
> >> different times) for the "under" part of my project (Algarve under
> >> and above)
> >>
> >> I suspect one issue causing the hollow sound is due to my diy wind
> >> protectors, those tend to cause a peak around 6khz since they act
> >> like leaky Helmholtz resonators. When Im back home I'll EQ the
> >> recordings. I have some material without the ear muffs in place but
> >> sadly not very much due to the windy conditions. After a week on the
> >> beach the cycle seems to go from inland wind to wind from the land
> >> back to the sea, theres perhaps half an hour between the change over
> >> or temperature inversion thats going on (=3Dstill air) before the cit=
y
> >> heat heads out to sea or perhaps its the wind simply changing
> >> direction - in either case that window is easy to miss, but good to
> >> look out for if faced with similar conditions.
> >>
> >> Its my last day here, I'd be very interested if you find out what is
> >> the main cause of the hollow or noise tonality change. For the
> >> linked recording I actually changed from over the ear to in-ear
> >> headphones trying to judge the correct head position but after some
> >> time it seems my ears became accustomed to the sound.
> >> The recording wasnt actually EQ'ed the pinna response may also be
> >> one reason for the sound?
> >>
> >> I still suspect something based on Rob's sphere rigs(TM) would of
> >> done a far better job, if you have something similar or can borrow a
> >> bowling ball complete with a mic thread ready to mount on a
> >> tripod :) it would be nice to hear the lake recorded with a sphere
> >> setup.
> >>
> >> A curved perspex head shape with a large acoustic foam baffle behind
> >> will be my next rig in the array a day department.
> > >
> >> Kind Regards,
> >> Mike.
> >>
> >> --- In
> >><naturerecordists%40yahoogroups.com>=
.com,
> >>Curt Olson <cro@> wrote:
> >>>
> >>> Thanks for posting this, Mike.
> >>>
> >>> Very nice tonal balance. Sweet in many ways, but... I hear a
> >>> certain "hollow" quality to it that's almost identical to my own
> >>> recent recordings on Lake Superior. I can't put my finger on
> >>> exactly what's going on. It might be as simple as being to close to
> >>> the waves, but I don't know for sure. I'm going back up to Lake
> >>> Superior tomorrow with several different mic rigs to see if I can
> >>> get an insight into the problem.
> >>>
> >>> Curt Olson
> >>>
> >>> Mike wrote:
> >>>
> >>>> Hi,
> >>>> Heres a sample recorded with a dummy head placed close to the
> >>>> waves.
> >>>> Recorded on Monte Gordo Beach Portugal / Algarve at 10 PM.
> >>>> This is cropped from a longer recording and has not been equalized
> >>>> or post processed besides the compression.
> >>>>
> >>>>
> >>>><http://urlme.net/audio/twominutesinthealgarve.ogg>http://urlme.net/a=
udio/twominutesinthealgarve.ogg
> >>>>
> >>>> Apologies for the ogg format, no mp3 encoder here.
> >>>> Audacity or vlc (videolan.org) should be capable of playing the
> >>>> clip.
> >>>>
> >>>> BR,
> >>>> Mike.
> >
> >
> >
>
>
> --
>
>
>
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