Why are there so many hairs on the surface of the microphone on the court?

Microphone windproof fur cover. In actual use, it can greatly reduce the impact of wind noise on recording when shooting outdoors and improve the quality of recording.

It is mainly windproof, otherwise you will hear the whistling wind.

If there is airflow rushing over, it will be broken up into small nests, so that it will not be transmitted into the microphone.

A similar application is the sheepskin waistcoat worn by people in northern Shaanxi. Only when the fine wool faces outward will it be warm, rather than the plush facing in. The purpose is also to resist wind.