Sound generator

A sound generator, comprising a shell, a vibration system

• and a magnetic circuit system;
• wherein,
• the shell sequentially accommodates and fixes the vibration system and the magnetic circuit system from a top to a bottom;
• the magnetic circuit system comprises a magnetic conductive yoke, a central magnetic circuit portion and a side magnetic circuit portion mounted on an upper surface of the magnetic conductive yoke;
• wherein a magnetic gap is formed between the central magnetic circuit portion and the side magnetic circuit portion;
• and at least one of the central magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet;
• the magnetic circuit system is provided with a rear sound hole;
• a rear cavity in communication with the rear sound hole is provided directly below the magnetic circuit system;
• the shell further comprises a lower cover plate located at a bottom of the sound generator, wherein the lower cover plate is configured to close the rear cavity;
• and
• at least one support foot extending toward the lower cover plate is provided on the magnetic conductive yoke.