![]() 2 This is especially true for higher-frequency sounds. As a result, they may be more difficult to hear and understand clearly, especially in noise. They have to then travel around your head so your ‘good ear’ can send them to the brain. Avoid the head shadow effect - Sounds that come from your ‘bad side’ fall in the shadow of your head.If you can only hear in one ear (unilateral hearing) it may be difficult to: It is only when you hear with two ears that your brain is able to fully understand sound. Muramatsu.Ears work as a team, and the brain needs them both to best understand speech and tell where sounds are coming from. Not just this, accessories such as earrings and piercings could also be used to create new communication systems," concludes Dr. " With our results, we have made great progress towards reliable, low-power communication systems that are not limited to hearing aids but also applicable to other head-mounted wearable devices. Moreover, because the radio waves used in HBC attenuate quickly outside of the body, HBC-based devices on separate people could operate at similar frequencies in the same space without causing noise or interference. For example, HBC could be implemented in wireless earphones to enable them to communicate with each other using far less power. ![]() After all, hearing aids are but one of all modern head-worn wireless devices. 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 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 pairs - one for each ear - and 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. But 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.
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