Air Conduction Earphones are a special type of Earphones that utilize air conduction technology to transmit audio signals. 
Unlike traditional Earphones, Air Conduction Earphones do not rely on inserting or covering the ears to deliver audio. Instead, they transmit sound vibrations through the bones or skin, allowing the audio signal to enter the auditory system via bone conduction or skin conduction.
The working principle of Air Conduction Earphones involves directly transmitting audio vibrations to the bones or skin around the ears, enabling the auditory nerves of the inner ear to receive the audio signals. This method bypasses the ear canal and eardrum, directly stimulating the auditory system to perceive the audio.

One major advantage of Air Conduction Earphones is that they allow users to maintain awareness of the surrounding environment. Since the ears are not completely sealed by the Earphones, users can still hear ambient sounds such as environmental noise, warning signals, or conversations with others. This is particularly useful for individuals who need to remain alert or hear external sounds in specific situations.

Additionally, due to the absence of ear insertion, Air Conduction Earphones can provide a more comfortable wearing experience. They are suitable for users who may find discomfort with in-ear Earphones or prefer not to have Earphones directly inserted into their ears.
It is important to note that while Air Conduction Earphones can offer a unique auditory experience and comfort, they may not match the audio quality of traditional Earphones. Due to the audio signal being conducted through the bones or skin rather than directly entering the ear canal, some audio quality may be compromised.
In summary, Air Conduction Earphones are Earphones that utilize air conduction technology to transmit audio signals through bone conduction or skin conduction. They provide a comfortable wearing experience while maintaining awareness of the surrounding environment.