Mr Gray consults in the field of signal processing. This specialty includes both detection of acoustic anomalies in the oceans, and modeling the behavior of other complex systems.
Mr Gray is one of the foremost authorities on axial flow fans – including all aspects of design, noise, and manufacturing. As founder and President of Airflow Research (now Bosch) he successfully changed the shape of fans for automotive radiator cooling, doubling the efficiency and minimizing the noise. Les continues to consult in this technical area. Mr. Gray is also one of the world’s experts on radiated noise characteristics of propellers. He consults in detection and classification of propeller acoustic signatures of various surface and underwater vehicles.