MadMan, it's as close as I've been able to get so far. The original effect was a one-time deal that was not done before or after this episode: a combination of the phaser sound and the photon torpedo sound (which I think was meant to be the "bouncing off" effect of the phasers against the neutronium hull). The sound mix still needs work, but yeah I know what you mean.
(thanks kaiser!)
(thanks kaiser!)