Loudspeaker module

A loudspeaker module, comprising a loudspeaker unit (2) and a peripheral frame accommodating and fixing the loudspeaker unit (2), wherein, the peripheral frame comprises an upper housing (11) and a lower housing (13), a front acoustic cavity is defined as a space between the loudspeaker unit (2) and the upper housing (11), and a rear acoustic cavity is defined as a space between the loudspeaker unit (2) and the lower housing (13);

• a sound hole (10) in communication with the front acoustic cavity is provided on the peripheral frame, wherein,
• acoustic waves radiated by a vibrating diaphragm of the loudspeaker unit (2) to the front acoustic cavity are radiated to outside through the front acoustic cavity and the sound hole (10);
• and
• an inverted tube is further provided in the peripheral frame, wherein, one end of the inverted tube is in communication with the rear acoustic cavity, other end of the inverted tube is in communication with the front acoustic cavity, and acoustic waves radiated by the vibrating diaphragm of the loudspeaker unit (2) to the rear acoustic cavity are radiated to the outside from the sound hole (10) after passing through the inverted tube and the front acoustic cavity,
• wherein the peripheral frame further comprises a middle housing (12) combined between the upper housing (11) and the lower housing (13);
• the middle housing (12) comprises an outer lateral wall (123) combined with the upper housing (11) and the lower housing (13), an inner lateral wall (122) provided in the middle housing (12), and a partition wall (124) provided at bottom of the inner lateral wall (122);
• the inner lateral wall (122) together with the outer lateral wall (123) forms a channel for transmitting acoustic waves;
• one end of the channel is in communication with the rear acoustic cavity, and other end of the channel extends to the front acoustic cavity;
• and
• the inner lateral wall (122), the partition wall (124), and the outer lateral wall (123) of the middle housing (12) together with the upper housing (11) form the inverted tube.