Short for Initial Time Delay. ITD is the gap in time between the arrival of direct sound and the first sound reflected from a surface of the room to the listener.
“I can talk to my Sales Engineer about any piece of equipment, and he always steers me in the right direction. He truly knows what he's talking about, and he never tries to over-sell me on anything. If he worked in the Nashville area, I'd probably owe him about 20 dinners by now!” Michael Erin Woody, Brentwood, TN