1. If there is a headset, the general headset is on the left, and there is no headset. There is no need to separate the left and right earphones without l and r, so you can wear it comfortably. Headphones are generally marked with L and R in the middle of the headset, some are on the inside and some are on the outside, with the words L and R. When music is recorded, two microphones are used to record the left and right channels in order to ensure high reproduction of the sound. L is the left channel, the ear will receive the sound of the corresponding left channel; R is the right channel, the ear will receive the sound of the corresponding right channel.
2. Create a stereo effect. People can distinguish the space, direction, and level by the left and right ears. The difference between the left and right channels allows the listener to identify the location of the sound and restore the sense of space based on the recorded audio. With good stereo sound, the listener can distinguish the location of the sound source and the process of sound source movement.
Like listening to music and playing games, what is needed is a strong three-dimensional effect.
3. The left and right ear structures are different. In order to allow the wearer to have a more comfortable user experience, most head-mounted or in-ear earphones will be designed differently in the shape of the earphones according to the structure of the left and right ears.