I wrote a bit about Frank Quitely’s use of integrated sfx in Batman and Robin (full article here)

‘Part of Quitely excellence is that the way he illustrates the sfx gives you an indication of decibels- not only noise level, but the way it sounds. Batman crashing through though those plates, for example- crockery breaking sounds a very particular way. Similarly, having rising water spell out ‘SPLSH’ as a car lands in a river immediately leads your brain to the sound of water, or something hitting the water. You can’t draw sound, but you can draw the object/s which creates the sound, and drawing sfx as part of that object, as an organic extension,  makes the sound more tangible, more instant. Instead of looking at a a fired missile trailing fire and smoke and then looking at a block of text reading 'BWKSSSSHHHH,’ you can simply have the trailing fire and smoke moulded to spell out 'BWKSSSSHHHH.’ It removes the pause, the separation and distance, and brings the sound and the object together for a much better, visually onomatopoeic experience.’