i have had master repica: ep3 obi, ep6 luke(green), and 1/2 of ep1 maul sabers.

i rent a single bedroom in a house of 3 other people.

the maul saber has a much lower/deep/quieter noise, the obi is average, and the luke saber (the oldest with 6 AA's) is very loud.
is it possible for me to open up the battery packs and maybe solder in a tiny switch somewhere along the speaker wire to disable the sound?

mostly so i dont annoy my other roomates in the house with the loud snap-hiss/humm of the sabers when i want to light up a saber or two.

or any other ideas? or is this is even possible?

thanks