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Old August 5th, 2004, 09:27 AM   #1
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Little help with sound dept.

My company and I figure that our weak area is with our sound dept.

I had posted here before regarding mics and what would be the best to purchase for our intensions. I was recommended the Sanken CS-1 for overall audio on a film production, which I am grateful for, again thank you.

In my research of this mic and several others that were also recommended, brought me with a few questions I was hoping several of you may be able answer.

can someone explain to me what off-axis low frequency is, my understanding is that the unwanted sound comign from off the axis point of the mic is eliminated.

and

a hypercardioid has a coverage angle of 105 degrees and a rejection of about 110 degrees right? What would the difference be to that of the supercardioid?

thanks
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Old August 5th, 2004, 01:14 PM   #2
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<<<can someone explain to me what off-axis low frequency is, my understanding is that the unwanted sound coming from off the axis point of the mic is eliminated. >>>

First, you should know that low frequency is usually considered as OMNI.
That means that it can be very hard to detect where the bass is eminating
(I would say yes once the room is "sonically loaded"). Therefore,
bass is mono. Personally, I don't agree with this 100%, but in terms
of *off axis low frequencies* what it means is that even though the
mic may be pointed away from a low frequency sound source, that low end
will still "load" the room. Therefore, the mic will pick it up even though
you are not aimed that way. This I agree with and if anyone tries to tell
you that any mic will reject off axis low frequencies, they are either lying
or bending the test results.

Sure, if you point a shotgun or hyercardioid
directly towards a subwoofer you'll get more low frequencies
than if you point away from the sub, BUT that's only because you are
not getting the *direct* sound waves, but those sound waves that are what
we call 2nd order (meaning that they've been reflected at least once and
have lost some sonic energy).

In any case, if you hear low end the mic will too.

A supercardioid is simply a mic with a slightly tighter pickup pattern.
Like maybe 90 or 100.
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Old August 5th, 2004, 01:17 PM   #3
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Listen to some clips and read a bit more on polar patterns.
Jay Rose on pattern recognition

Various mic clips
More clips
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Old August 13th, 2004, 10:18 AM   #4
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wow, thanks a bunch guys
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