3 ms·it also operates at (less than) the speed of sound.by dnautics 6y agoit also operates at (less than) the speed of sound.Balgair 6y agoThe brain is slower than the speed of sound in what medium?jamiek88 6y agoThe one people always mean unless they specify otherwise: Air.dnautics 6y agoWell in this case it's the fleshy medium of your brain.