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Re: the frustrations of engine noise

Subject: Re: the frustrations of engine noise
From: "freitojos" freitojos
Date: Thu Jul 5, 2012 2:01 pm ((PDT))
I am sory,
The link is here:
http://soundcloud.com/freitojos/120627t0800z-santmargdaserra
regards,
Jos=E9

--- In  "freitojos" <> wr=
ote:
>
>
> here is a plane and a car recorded with parabolic microphone 60cm diamete=
r and mkh 40 in the focus with mic splitter for dual mono. To my ears ther =
is no rejection, only amplification, with the parabola of the plain and car=
 sounds.
> Jos=E9
> --- In  Scott Fraser <scottbfraser@> wro=
te:
> >
> > <<Could you say more about directional mics? I'm not sure I understand =
what you are suggesting here. It sounds like you are saying that some mics =
have better vertical rejection while retaining horizontal acceptance? Is th=
at what you mean? That would be very useful in so many situations. Would th=
at apply to the ME66 as well as the MKH-416 (which is way beyond my means)?=
 My problems with airplane noise have increased since I started recording w=
ith omnis in a home built sass/pbba type array. Getting a second used ME66 =
is doable and worth considering if you think that would help reduce noise f=
rom the sky.>>
> >
> > The problem with aircraft noise is that it doesn't just come from the s=
ky. It arrives to our ears & microphones from all directions because we are=
 in a diffuse field, meaning the volume of the reflected sound is equal to =
or greater than the volume of the direct sound. In my experience there's on=
ly a marginal difference between aiming a cardioid mic away from or directl=
y at a passing aircraft. Same with distant traffic, you get a few dB improv=
ement at best by aiming away from the general direction of a highway. Havin=
g a big physical barrier, such as a hill, between you & that highway will d=
o far more to attenuate traffic noise than merely aiming your mic the other=
 way.
> > A directional microphone does not have a horizontal nor vertical orient=
ation. It picks up equally well above & below the horizon as it does to the=
 sides. Also realize that adding a second directional mic makes the resulti=
ng stereo array less directional than a single mic.
> >
> > Scott Fraser
> >
> >
>








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