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Re: New sound technology (market research)About 10 years ago my day job tried out headphones that did just that. They sat behind your ear and did bone condution. Emergency services crews were using them so they could hear the situation around them, and also hear their two way radios. IIRC, the plug on the headphones was 3.5mm TRS. I'm sure you must be able to get them and use them for comms.
Re: New sound technology (market research)
About 10 years ago my day job tried out headphones that did just that. They sat behind your ear and did bone condution. Emergency services crews were using them so they could hear the situation around them, and also hear their two way radios. IIRC, the plug on the headphones was 3.5mm TRS. I'm sure you must be able to get them and use them for comms.
