Good Evening, Kent,

As Andy says, most leaf shutters are quieter than focal plane shutters, although much of the noise with the latter is often the up and down mirror action, especially with medium format cameras. One notable exception is the shutter on my Fuji GW67 rangefinder camera which is, for some strange reason, much louder than one would expect.

The second major advantage to a leaf shutter is that it will X-synch at any setting.