| Subject: | Re: Parabolas and low frequencies |
|---|---|
| From: | "Ian Martin" irmartinau |
| Date: | Fri Feb 10, 2012 7:12 am ((PST)) |
Hi John, According to my rough calcs the cutoff freq for your 21" parabola will be about 320 Hz, give or take a bit, and so your seals should record OK provided they are not too far below 500 Hz. Ian |
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