Science Alert July 26, 2021 There are significant limitations hindering acoustic tweezers for broad practical application. Although hemispherical arrays of acoustic transducers can be used to create the sound trap, creating just the right sound field to lift an object and move it far from the transducers is very difficult if there is a surface that reflects sound. Researchers in Japan have developed a technique splitting the transducer array into blocks and used an inverse filter to reproduce sounds based on the acoustic waveform. This helps optimize the phase and amplitude of each transducer channel to produce the desired acoustic […]
Tag Archives: Biomedical technology
Your body is your internet — and now it can’t be hacked
Science Daily March 12, 2019 Radiative communication using electro-magnetic fields amongst the wearable and implantable devices act as the backbone for information exchange around a human body enabling applications in the fields of connected healthcare, virtual reality etc. As EM signals propagate in all directions, they allow an eavesdropper to intercept the information. Researchers at Purdue University have developed a method called Electro-Quasistatic Human Body Communication (EQS-HBC) for localizing signals within the body using low-frequency carrier-less transmission, thereby making it extremely difficult for a nearby eavesdropper to intercept critical private data. Detailed experiment reveals that the quasi-static leakage due to […]