Here's the context. It has to be a stand alone sound.
"Drop the Bosun,” growled Gruilash, waving his gun at Tarquin from across the billiard table. “Put the amulet on the table and slide it to me."
Tarquin obeyed. The yellow light from the crystal chandelier made Gruilash’s shiny, green, reptilian skin look a putrid, sickly yellow.
(Phaser bolts here} - Thwish, thud, thud. Gruilash’s bodyguards fell to the floor.
Startled, Gruilash’s inner eyelid flashed across his eyes and he blinked. Tarquin watched as two tall, ghostly white humanoids dressed in black and purple leather frock coats sashayed into the room from an adjoining corridor with their guns pointing at Gruilash.
TBO
Chris,
On earth, in a ballroom under a lake.... It would be phaser bolts.
TBO
So, handheld (nobody wants to drive a tank under a lake, or across a ballroom, for that matter; can't quickstep) and in atmosphere, unless 'under a lake' means literally, and it's in water. A geometrically straight line of bubbles, and a shock wave through the water like being hit by a flying mattress, compressing the eardrums like a depth charge, with – no, Tarquin isn't amphibious, it's air.
It's a pity I don't know quite how a phaser operates (except on guitar, obviously. I've built one of those). A laser, I know, have babied one through a world tour, not a great antipersonnel weapon; burns a hole through anyone not wearing a mirror, but, if the someone turns out to be a berserk viking, it kills them but they don't have time to notice, so keep charging. If you wave it about too much it just burns the skin off, like stroking him with a soldering iron. No stopping power.
A maser is a cross between that and a microwave oven. If tuned for 'water', the first significant volume of liquid water it meets is vaporised instantaneously. If this water happens to be in the brain of a sentiet being the sound is similar to an exploding teakettle as the skull gives way.
Sure, and a squaser is obviously two diverging planes of force brought in from either side of your target and if he is insufficiently armoured against the force he is flattened and his innards squirt out of the top and bottom (sufficiently armoured and he's spat out like a pumpkin seed. Speciality models, the lemon squaser and the garlic squaser are used for zombies and vampires respectively.
If a phaser happens to use the same Beetonian technology as the time machine it might place their kidneys in the jurassic while leaving most of the rest of them here and now (if 'now' is something that interests these guys) – not a particularly interesting sound, but the sensation…
Of course, if it gives a visible manifestation we adjust the sound effect to match the colour, with a reddish beam producing a growlier, edgy sound while blue or white (to contrast with the chandelier) would be more sizzly, thinner (can our friend with the nictitating membranes see infra red? A lot of reptiles can. And, since nictation is blinking, is the travel of the third eyelid sufficient for a blink?) to fit the picture. Actually you're more likely to get a boring sound like a whip crack, as air tries to get out of the beam at supersonic speeds.