Speaker module and wearable device

A wearable device, comprising:

• a frame;
• and
• at least one speaker module, configured to the frame, the at least one speaker module comprises:
• a driving unit, used to generate sound;
• and
• an enclosure, contains the driving unit, and has a front opening, a first rear opening and a second rear opening, wherein a sound sum of the sound output from the front opening, the first rear opening and the second rear opening has directivity, the front opening and the first rear opening form a first vector towards the front opening, the front opening and the second rear opening form a second vector towards the front opening, the first rear opening and the second rear opening form a connection normal vector perpendicular to a connection of the first rear opening and the second rear opening and away from the front opening, an inverse vector of the connection normal vector, the first vector and the second vector are added to form a combination vector, the front opening has a front normal vector towards the outside of the enclosure, an unit vector of the combination vector and an unit vector of the front normal vector are added to form a sum vector, and a direction of the sum vector is a direction of the sound sum.