Abstract
This work describes the performance of an ultrasonic imaging scheme suitable for operation in a low signal to noise ratio environment. Based around a series of dedicated correlators, a multi-element system suitable for on-line array applications is described in conjunction with potential imaging and image processing strategies. A selection of experimental results is included to verify the potential of the overall approach. Although designed specially for those applications in which peak energizing powers are limited, the basic strategy is suitable for a wide range of applications that are limited by the available signal to noise ratio. These include ultrasonic non-destructive evaluation of attenuating materials, airborne ultrasonic imaging, intrinsically safe inspection and biomedical investigation.
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