Acoustic Bomb Detecion Test (IMAGE) Vanderbilt University Caption To test the acoustic system's ability to detect the difference between different types of explosives, the researchers prepared non-explosive simulants of different types fo explosive, attached a plastic cap to simulate the casing. The sample was subjected to acoustic waves and a laser vibrometer was used to measure how the plastic cap vibrates in response. Credit Douglas Adams, Vanderbilt University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.