Underwater sound in the oceans has been significantly rising past decades due to an increase human activities, adversely affecting marine environment. In order assess and limit impact of underwater noise, European Commission's Marine Strategy Framework Directive (MSFD) included long-term monitoring low-frequency as a relevant indicator achieve good environmental status. There is wide range comm...

Abstract In this article, attempts are made to grow large size PZN-PT single crystals using high temperature solution growth method by implementing novel bottom cooling technique. The grown oriented and poled along 〈001〉 direction obtained larger piezoelectric strain coefficient (d 33 > 2000 pm V −1 ) suitable for development of underwater acoustic sensor requirements. Flexural mode hydropho...

PURPOSE Accurate and efficient guidance of needles to procedural targets is critically important during percutaneous interventional procedures. Ultrasound imaging is widely used for real-time image guidance in a variety of clinical contexts, but with this modality, uncertainties about the location of the needle tip within the image plane lead to significant complications. Whilst several methods...

Ultrasound imaging is frequently used for guiding needles during minimally invasive procedures, but accurate identification of the needle tips can be challenging, even for experienced practitioners. In this study, a novel method for tracking needles inside the human body was developed. This method, called ultrasonic device tracking (UDT), involved the detection of ultrasound pulses from the ext...

During a few past years a series of shock-wave generators for lithotripsy and/or tissue destruction studies have been developed in our laboratory. Based on the experiences in shock wave measurements and the drawbacks in existing hydrophones, we have developed a very low-cost, wideband, reproducible shock-wave hydrophone. The key element of this device is the rapidly mounting, disposable PVDF me...