![]() ![]() Overall, this study showcases the potential of HBC and extends the applicability of this promising technology. They also calculated the levels of electromagnetic exposure caused by their system and found that it would be completely safe for humans, according to modern safety standards. In this way, we clarified the transmission mechanisms of the proposed HBC system." Finally, with these results, they determined the best electrode structure out of the ones they tested. Muramatsu puts it, "We calculated the input impedance characteristics of the transceiver electrodes, the transmission characteristics between transceivers, and the electric field distributions in and around the head. ![]() Using human-body models of different degrees of complexity, the researchers first determined the best representation to ensure accurate results in their simulations and then Once this was settled, they proceeded to explore the effects of various system parameters and characteristics, as Dr. ![]() In fact, the researchers had previously conducted an experimental study on HBC with real human subjects, the results of which were are also published in Electronics. In a recent study, which was published in the journal Electronics, the researchers investigated, through detailed numerical simulations, how electric fields emitted from an electrode in one ear distribute themselves in the human head and reach a receiving electrode on the opposite ear, and whether it could be leveraged in a digital communication system. Because these hearing aids are in direct contact with the skin, they made for a perfect candidate application for HBC. Such hearing aid devices come in pairsone for each earand greatly improve intelligibility and sound localization for the wearer by communicating with each other to adapt to the sound field. Dairoku Muramatsu from Tokyo University of Science and Professor Ken Sasaki from The University of Tokyo focused on using HBC for a yet unexplored use: binaural hearing aids. To explore the full potential of HBC, researchers from Japan, including Dr. However, even research on HBC began over two decades, this technology hasn't been put to use on a large scale. By interfacing skin-worn devices with electrodes, we can enable them to communicate with each other using relatively lower frequencies than those used in conventional wireless protocols like Bluetooth. The main idea is that some electric fields can propagate inside the body very efficiently without leaking to the surrounding area. Moreover, the human body itself also constitutes a large obstacle because it absorbs electromagnetic radiation and blocks signals.īut what alternatives do we have for wearable technology? One promising approach is "human body communication" (HBC), which involves using the body itself as a medium to transmit signals. But, this method of transmission not only demands a lot of energy but can also be unsafe from a cybersecurity standpoint. The usual approach of using an antenna to radiate signals into the surrounding area while hoping to reach a receiver won't cut it for wearables. However, for wearables to truly transcend portables, we will need to rethink the way in which devices communicate with each other as "wireless body area networks" (or WBANs). Now that these devices can be made even smaller and lighter without loss of functionality, it's likely that a great part of next-generation electronics will revolve around wearable technology. Modern portable devices are the result of great progress in miniaturization and wireless communications. Their findings pave the way to more efficient and safer head-worn devices, such as binaural hearing aids and earphones. To tackle this issue, scientists from the Tokyo University of Science, Japan, delved deep into human-body communications, in which human tissue is used as the transmission medium for electromagnetic signals. Wearable technology seems all poised to take over next-generation electronics, yet most wireless communication techniques are not up to the task. Scientists show how head tissue can be safely used as the transmission medium for head-worn electronics ![]()
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