Patent ID: 8259985

Claim:
A speaker set configured for a portable electronic device comprising: a hollow shell comprising a base wall, a plurality of sidewalls surrounding a periphery of the base wall, and at least one partition wall dividing an inner space of the shell into a first chamber, a second chamber, a third chamber and a fourth chamber, the second and third chambers positioned at opposite sides of the first chamber and two opposite sidewalls each defining a sound propagation port communicating the third and the second chambers with a surrounding environment; a back cover; and a loudspeaker packaged between the shell and the back cover, the loudspeaker accommodated in the first chamber, dividing the first chamber into a front sub-chamber and a rear sub-chamber, the front sub-chamber communicating with the second and the third chambers to form a front resonance chamber, the rear sub-chamber communicating with the fourth chamber thereby forming a rear resonance chamber, the loudspeaker having a plurality of front tone holes communicating with the front sub-chamber and a plurality of rear tone holes communicating with the rear sub-chamber so sound waves emanated from the front tone holes can be transmitted to and resonate in the front resonance chamber and then transmitted in opposite directions to the surrounding environment through the sound propagation ports.