A sound device includes a sound production unit, a support assembly, a sound absorption material, and a cover plate. The sound production unit includes a vibrating diaphragm, and the vibrating diaphragm is configured to vibrate and sound. The support assembly is fixed to one side, distal from the vibration diaphragm, of the sound production unit. The support assembly and the sound production unit jointly define a sound production rear cavity. The support assembly includes a ventilation structure and a powder filling hole. The ventilation structure is configured to release pressure. The powder filling hole penetrates through the ventilation structure. The sound absorption material is filled into the sound production rear cavity through the powder filling hole. The cover plate covers and is fixed to the powder filling hole. Acoustic performance of the sound device is improved through the sound absorption material.