Abstract
Ultrasound plays a crucial role in various applications, including acoustic microscopy, medical imaging, therapy, and non-destructive testing. Despite its extensive use, experimental mapping of nonlinear focused ultrasonic fields is largely overlooked when compared to its linear counterparts or simulated nonlinear fields. The oversight arises from the inherent challenge of discerning electrical and acoustic nonlinearities. This research paper addresses this gap by proposing a 3D nonlinear ultrasonic field mapping system designed to provide precise measurements and imaging of both linear and purely acoustical nonlinear focused fields. The study involves initial simulations of linear and nonlinear ultrasonic fields emitted by a focused transducer in three dimensions. Subsequently, the proposed system is designed and experimentally validated through the acquisition of linear and nonlinear focused ultrasonic fields in two distinct fluids. The precision of the system is further demonstrated through the successful measurement of nonlinear parameters in the tested media, thereby contributing to the progression of nonlinear ultrasound field mapping and its applications.