Sound generator

A sound generator including:

• a housing with an acoustic cavity, the housing comprising an upper case with an opening at one end, and a rear cover which covers the opening and encloses the acoustic cavity with the upper case, the upper case comprising a bottom wall and a side wall extending from an edge of the bottom wall toward the rear cover, and a mounting base extending from the bottom wall towards into the acoustic cavity and a separation plate extending from the mounting base to the outside of the housing, with a sound channel facing toward the side wall is formed between the bottom wall and the separation plate, and the sound channel forming a sound port in the side wall;
• a speaker unit accommodated in the acoustic cavity and being mounted on the mounting base, the separation plate abutting against a side of the speaker unit;
• a front cavity and a back cavity formed by acoustic cavity divided by the mounting base, the speaker unit and the separation plate;
• at least one peripheral wall extending from the mounting base and/or the separation plate, to obtain a cavity enclosed by the peripheral wall along with the mounting base and/or the separation plate;
• wherein
• a first through-hole is formed on one of any two of the peripheral wall, the mounting base and the separation plate, and a second through-hole is formed on the other of the any two of the peripheral wall, the mounting base and the separation plate;
• and
• the cavity is a sealed resonant cavity, which communicates with the front cavity only through the first through-hole and communicates with the back cavity only through the second through-hole.