While I quietly assemble and fly KSP rocketships, my wife quietly reads nearby, enjoying the gentle music and Wernher Von's ah-hah's. Until I launch or crash-land one, whereupon the sudden noise makes her jump out of her chair and stomp out of the room.
By now I don't need an audio reminder that boosters have ignited or that the ship is becoming a cloud of debris.
How can I quieten, mute, replace, or disable these two loud sounds?
Change a setting in a Unity config file?
Delete or replace a few .wav's?
Dual-boot into Linux and learn how to do PulseAudio filtering wizardry?
Insert a hardware compressor-limiter between the PC's line out and the loudspeakers?
Or resign myself to headphones?