Abstract: An earbud, including a housing, a speaker assembly, and a partition, is provided. The housing includes a sound outlet hole and a sound tuning hole, wherein the sound outlet hole is in acoustic communication with an ear canal of a human ear but does not contact the ear canal. The speaker assembly is disposed in the housing to separate a space in the housing into a front cavity and a rear cavity. The partition is disposed in the front cavity of the housing to divide the front cavity into a first area close to the speaker assembly and a second area away from the speaker assembly. The partition is between the first area and the second area, and the partition has a thickness and includes multiple first through holes, wherein the first through holes pass through the partition to connect the first area with the second area.

Abstract: An earbud, including a housing, a speaker assembly, and a partition, is provided. The housing includes a sound outlet hole and a sound tuning hole, wherein the sound outlet hole is in acoustic communication with an ear canal of a human ear but does not contact the ear canal. The speaker assembly is disposed in the housing to separate a space in the housing into a front cavity and a rear cavity. The partition is disposed in the front cavity of the housing to divide the front cavity into a first area close to the speaker assembly and a second area away from the speaker assembly. The partition is between the first area and the second area, and the partition has a thickness and includes multiple first through holes, wherein the first through holes pass through the partition to connect the first area with the second area.

Abstract: Disclosed are an active noise reduction acoustic unit and a sound-producing unit, the active noise reduction acoustic unit includes a casing; a baseplate which is arranged in the casing and separates the casing into a first accommodating cavity and a second accommodating cavity; the first accommodating cavity and the second accommodating cavity are in communication with each other, the second accommodating cavity being provided therein with a feedback microphone, and the feedback microphone being configured to pick up noise signals; and the first accommodating cavity is provided therein with a moving iron speaker which can vibrate and produce sound according to the noise signals.