Walt, the only point with a mono mic in a parabol is that you have better
control.
Using two PZM's, like the Stereo DATmic, means - by necessity - that the
polar diagram gets a bit undefined. This is unwanted for the scientist, who
want's mono anyway.
Sometimes the cardioid half of Twin Science is more efficient than Stereo
DATmic:
Suppose you have a frog in high grass and wind. The cardioid, facing
inwards, will focus on the frog and attenuate the wind sounds from the
grass. However, in stereo, perhaps you don't mind the wind sounds, as they
sound "natural".
Klas.
At 20:11 2003-10-22 -0400, you wrote:
>a_kirchgessner wrote:
>> Walter,
>>
>> One of the (few, so far) experiments in field recording with a
>> parabolic mic that I have tried is the placement of the stereo mics
>> within the dish. Placing them close together at the focal point
>> versus separating them along different axes has yielded surprising
>> results. As a user of a parabolic mic, the question I am pondering is:
>> how much of a loss in pick-up can I tolerate to achieve a greater
>> stereo effect? I'm looking forward to the answer, but the experience
>> gained in the experimentation is the true reward here for me.
>
>I use the Telinga Pro V with the stereo mic element they design for it.
>I also have the mono dual science element, which I rarely use. Between
>those two I find little difference in sensitivity. This may be due to
>the stereo mic setup being a boundary mic design. In any case I've seen
>no reason to loose stereo to gain sensitivity. Faint sounds is where
>stereo really helps.
>
>Note that the Telinga's stereo is a mix of local and far field. I kind
>of view it's field as being pear shaped, with the stem being the far
>reach in center.
>
>There was considerable stir in the group a little while back on stereo
>parabolics. My feeling is that optimizing a stereo pickup in a parabolic
>is a little more challenge than optimizing two mics without a reflector.
>But it's well worth it.
>
>I've got a few ideas to try when I get some time. Requires some
>machining to do.
>
>Walt
>
>
>
>
>To unsubscribe from this group, send an email to:
>
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>
Telinga Microphones, Botarbo,
S-748 96 Tobo, Sweden.
Phone & fax int + 295 310 01
email:
________________________________________________________________________
________________________________________________________________________
|