Quote:
Originally Posted by karamazovnew
Nictalope, amazing link, those schemes almost make me dizzy  |
:rotfl: absolutely true
Nonetheless is interesting note some simple facts:
* That GHG worked in 4 fecuencies and which used most were 3 khz and 6 khz
* "Average merchant ships, cruising at 12-13 knots, produced a maximum sonic spectrum at . 100
Hz and only 10% at 4 kHz. For destroyers cruising at 15 knots, the maximum sonic spectrum
was at . 200 Hz, but still supplying 30% of its harmonic spectrum between, 4 kHz and 8 kHz.
Thus the proportion of sonic signal level left at the higher harmonics, had to be compensated for
by increasing the amplification gain."
* Necessary depth for listening usually improved greatly @ 20 meter (best @ 50)
* "The electrically powered underwater boats had to reduce their speed to a few knots only (< 3 knots). If they were submerged and powered by a Diesel engine, in combination with a 'Schnorkel', the engine(s) had
to be completely switched off. Because the standard GHG system proved unable to receive sonic information adequately, when the submarine was sailing submerged (because of the use of the schnorkel the U-boat had to steer just under the interfering water surface)."
* At Maass's proposal, a group of hydrophones were integrated into a newly constructed hull,
placed in front of the lumber keel. This modification was successfully tested in U-194 in
February 1943. One of the improvements was the Balcony hydrophones were maintained at a 2.5
m lower level and thus were less vulnerable to many sorts of hampering interference.
So mods i guess could be developed on these notes, provided they're interesting enough to make them work. The main cfg files must be worked, i take it?
Anyway, in case passed unsuspected, i've worked a bit on hydrophone ship sound, had some recordings from several types and reworked them from skratch as accurately as I could, though i've kept some bass (you're absolutely right, karamazovnew, on the lack of bass thing on those years' equipment
) but is swallowed away on distance anyway. Mod is here :
http://www.subsim.com/radioroom/showthread.php?t=153138
Can't tell if anyone tried this one
As i experienced in GWX-ed SH3 had to slow down speed almost to a full stop in order to get a 14km faint sound from ships and sonar op doesnt tell you a damn bout those sound while surfaced ( a good GWX fix, i take?), but still no too keen on those far away while submerged.
Cheers
