On Tue, Nov 05, 2013 at 10:20:35PM +0000, John Leonard wrote: > Hmm, not what I've found: I mean, really not what I've found.
No point in discussing basic physics, a self noise of 19 dB(A) and a sensitivity of 7 mv/Pa amount to -116 dBm(A) at the input of the preamp. Unless I botched up the the calculations: 7 mV = -43.1 dBV = -40.9 dBm 1 Pa = 94 dB SPL 19 - 40.9 - 94 = -115.9 > Sorry to disagree, but I've tried a number of systems and have > found that the low-cost recorders that I've used, un-modded, have > had unacceptable noise levels when cranked up. And what EIN levels do the specs of these recorders state ? There may be a different issue at work here. EIN is normally measured at maximum gain. A well-designed preamp should have more or less constant EIN for the upper 25..30 dB of the gain range, but many don't. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
