I did find this post: https://www.reddit.com/r/techsupport/comments/1av67o1/my_window_ac_unit_turns_off_my_headphone_audio/ which was very similar, but I'm not certain if it's the same issue
My speakers are also USB powered to my PC, however my PC is plugged into a UPS which should be resolving any power supply issues.
The speakers are the Creative Pebble v3, which support bluetooth but I don't use it. It's plugged in using Type-C to the back of the motherboard.
My UPS is a CyberPower 1500 VA. The air conditioner is a Midea Duo 12,000. It is located 6' away from my PC, and 9'