Does the subject want to ask, "What is the reason why the earphone leaks like the external sound?" The causes of sound leakage in headphones are the same as those of external playback, which are the design problems, the use environment problems and the quality problems of headphones.

1, earphone design problem: the earphone shell is too large or too small, or the earphone sealing material is not high enough, which will lead to sound leakage. In addition, the process of earphone speaker unit is rough, which will also cause sound leakage.

2. Usage environment: Using headphones in noisy environment, or turning the volume of headphones too high, will cause headphones to leak sound.

3. earphone quality problem: some low-quality headphones will leak because of material and workmanship problems.

Headphones are personal audio devices, which are used to transmit sound directly to users' ears. Headphones consist of two small speakers called earplugs or earmuffs and a cable connected to an audio source. Headphones can be headset, plug-in or earhook.