As with many things, it is possible to make an invisible earphone set out of stuff you may have lying around the house and materials that are easy enough to source online. For an easy-to-follow instructional video below.
The method relayed here has been taken from Frank GuYun of Instructables.com. Links to the original article have been provided. In order to follow the process completely, you’ll need to follow both his technical schematics and his instructional video. This answer will work best if you relate to it as a companion piece, or ‘checklist’ if you will.
Bone conduction headphones (commonly referred to as ‘Bonephones’) are actually really clever. In order to best explain how they work, I’ll need to take you on a journey into the Human ear…
No, not literally. That would be disgusting.
OK, so you know how sound travels through the air? Surely you must have done that science experiment at school where you hear sound disappearing into an airless vacuum? Yup, it’s just like that.
Communication is the activity of conveying information through the exchange of thoughts, messages, or information, as by speech, visuals, signals, writing, or behavior. It is the meaningful exchange of information between two or more living creatures.
One definition of communication is “any act by which one person gives to or receives from another person information about that person’s needs, desires, perceptions, knowledge, or affective states. Communication may be intentional or unintentional, may involve conventional or unconventional signals, may take linguistic or non-linguistic forms, and may occur through spoken or other modes.”
There are quite a few police earpieces on the market right now, Renée, so the high likelihood is that whatever you need, someone, somewhere will be selling it. If it helps, I’ll give you a bit of an overview…
If you’re in the market for an overt earpiece, or even if you fancy something a bit more discreet (like, um, a covert earpiece), you’ll certainly be able to find it on the World Wide Web. Police organizations across the world employ a wide variety of communications equipment, from ‘listen only’ devices to PTT (Push To Talk) earpieces and, as I said, a significant portion of that equipment is available for consumer purchase.