Two designs of wireless earplugs exist insert and in-ear (custom-molded). Insert type is similar to hearing aids and uses a tiny device that fits directly into the ear canal. A speaker is built into the machine, and sound picked up by the microphone is transmitted wirelessly to the insert. The main difference between this and standard hearing aids is that there isn’t any tubing (the tubing that goes from the hearing aid to the ear) which makes it very small. This design can be problematic for people with chronic ear infections or excessive ear wax because they cannot be removed/cleaned like regular hearing aids since they go deep into your ears.
Standard in-ear style earplugs work just as their name suggests. They fit right into your ear canal and have a speaker built into the tip of the plug. They also have some non-removable tubing that connects from the information to a battery/control unit, usually located on your belt clip. This tubing, typically made from rubber or silicone, can be very helpful when removing earplugs since it gives you something to grip onto, unlike the insert style where you have to stick your finger deep inside your ear canal to grab hold of them.
The main problem with all wireless earplug designs is sound leakage. This isn’t an issue for people who don’t care too much about hearing other people talking. However, if you want to remain in the “stealth” status when using these devices, you need to consider how well they fit your ear and seal.
These types of earplugs were created for military personnel to protect them from loud explosive noises. They can be dangerous and even deadly when used incorrectly since they completely block out all sound. This also means that you cannot hear someone yelling at you if they try to get your attention which could prove fatal in certain situations. Please use common sense while using these products!