linuxaudio.org

On 06/24/2010 12:06 AM, fons@kokkinizita.net wrote:

quoted text
> On Wed, Jun 23, 2010 at 11:34:50PM +0200, Arnold Krille wrote:

>

>> On Wednesday 23 June 2010 23:11:55 Jörn Nettingsmeier wrote:

>>> i got this idea when i had to capture an african drum and was constantly

>>> missing the fundamental. with no omnis at hand, i improvised one. what's

>>> worse, i even shoehorned this bastard omni into a pressure boundary

>>> microphone by taping it onto a mousepad and putting it on the floor.

>>> sure, there was coloration, but for that particular drum, it worked.

>>

>> So that is what mousepads are for!

>

> Except that for a PZM you need a hard surface.

well, yes and no. any practical pzm has rubber pads to protect them from

floor vibration. the mousepad i used had a rather hard surface, and soft

rubber underneath. actually just used the pad so that i could move the

microphone around and protect it from scratches and other damage. i'd

expect the lf absorption of that pad to be pretty minimal, particularly

since its area is so small compared to the relevant wavelengths. so the

relevant boundary here is the floor, not the pad.
of course, high frequencies are messy, but as i said, with a bit of eq,

for this particular application it worked.
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