(From ZHANG Hao of CAS Key Laboratory of Noise and Vibration Research) Professor Malcolm J. Crocker from Auburn University paid a visit to IACAS on Jun.23, 2010 and gave a wonderful lecture entitled "Noise of Rocket Exhausts at the Launch of a Spacecraft".

Professor Malcolm J. Crocker is a world wide famous Acoustics expert. He has nearly 50 years' experience in many theoretical and experimental studies in noise and vibration. In particular his studies have involved acoustical measurements, noise and vibration of aerospace structures, machinery noise, damping measurements and active control.

Professor Malcolm J. Crocke's lecture introduced the prediction methods and experiment results of the noise of rocket exhausts at the launch of a spacecraft. He introduced two kind of methods to predricting the noise of the rocket exhausts, then compared the noise before deflector, after the deflector and the total noise in detail. The analysis show that the relative magnitude of the three parts of the noise have very complicated relationship with the hight of the rocket when the spacecraft is launching. The video of launching the spacecraft gave the audience impressive image of the noise.

More information about Prof. Crocker

Malcolm J. Crocker has been involved in acoustics, noise and vibration research since his master's degree noise and vibration studies in 1963. From 1957 to 1962, he was a coop student working for a BS degree at Southampton University and supported by the British Aircraft Corporation. During 1963 to 1966, he worked at Wyle Labs in Huntsville, Alabama on noise and vibration problems for NASA during the Saturn Moon Program. From 1969 to 1983, he headed up Purdue University's undergraduate and graduate teaching and research program on noise and vibration. In 1983 he came to Auburn as Head of Mechanical Engineering, and in 1990 he was promoted to Distinguished University Professor. He has been involved in many theoretical and experimental studies in noise and vibration over his career. In particular his studies have involved acoustical measurements, noise and vibration of aerospace structures, machinery noise, damping measurements and active control. Recently at Auburn he has conducted several studies for industrial sponsors such as IBM, Trane Company and American Gas Association on noise control and acoustical measurements. He has also been supported as PI on substantial multi-year grants or contracts for research on aero-acoustics and active control for NASA and DOD (SDI) and passive damping on composite sandwich materials for, NASA, ONR, and NSF.