Open means that the back of the sound generating unit of the earphone is connected with the outside world, and there are many small holes in the shell of the earphone or the sound generating unit inside can be directly seen. When in use, the user can hear the outside sound, and people around him can also hear the sound from the earphone (commonly known as sound leakage).

Closed earphone means that the sound generating unit is not connected with the outside, and the sound generating unit is in a completely closed cavity, which can reduce the external noise when used. The earmuffs of headphones often use leather and some sound insulation materials.

Extended data:

Closed headphones are often used not only when going out on the street, but also for monitoring and recording studio. For musicians, recording requires very clear and clean sound, and at the same time, it is necessary to avoid interference from the external environment. These are exactly what enclosed headphones have.

Although its sound field is not as wide and natural as open headphones, it has a strong sense of sound surround and can bring better immersion. In addition, the low frequency of closed headphones is more vigorous and elastic than that of open headphones, which is very suitable for listening to pop music. However, in the eyes of enthusiasts, the performance of medium and high frequency is the strength of headphones, so in the circle of enthusiasts, open headphones are still the main topic of their discussion.

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