launch transients, torpedo sounds, and realism

[Keelbuster]

I'm sure this topic has been beaten to death over the years, but it still bugs me. I'm not sure what the advantage was of an electric torp over a steam torp in real life, because I imagine that a torpedo launch (and it's entire subsequent run) would be such a noisy event that escorts would most certainly hear it, and hence get a good bearing to the attacker from it. Like - in real life, at torpedo launch, I imagine that ships would start evasion right away following a 'Torpedo in the water' report. I wonder if there's some way to mod this into SH3??