Wearable device

A wearable device, adapted to be worn on an ear, the wearable device comprising:

• an acoustical component, comprising a guide surface, the guide surface is located in a virtual plane;
• and
• a wearing component, connected to the acoustical component, an extension axis of the acoustical component is different from an extension axis of the wearing component,
• When the wearable device is worn on the ear, at least one of the acoustical component and the wearing component contacts at least one of a tragus and a cavum conchae of the ear, an airflow flows from a first side of the virtual plane toward a second side of the virtual plane, the airflow forms a stagnation point on the guide surface and forms a first region at the second side, a Reynolds number of the airflow in the first region is less than 4000, an atmosphere sound inlet of an atmosphere sound channel formed by the wearable device is located at the second side and in the first region.