Loudspeaker and terminal device

A loudspeaker, comprising:

• a loudspeaker body having a containing cavity inside the loudspeaker body;
• a transducer accommodated in the containing cavity, wherein the containing cavity is separated by the transducer into a front cavity and a rear cavity along a first direction, and the loudspeaker body is provided with a sound hole in communicating with the front cavity;
• and
• a throat having a throat cavity inside the throat, and provided with a first mouth and a second mouth sequentially arranged in a second direction, wherein the second direction is perpendicular to the first direction, the first mouth is arranged corresponding to the sound hole, and the throat cavity is in communication with the front cavity via the first mouth and the sound hole, and in communication with an external portion of the throat via the second mouth,
• wherein in the first direction, the throat includes a first wall body and a second wall body, and the first wall body is farther away from the rear cavity than the second wall body;
• wherein an extension direction of a wall surface of the first wall body is parallel to the second direction, and the second mouth is provided on the first wall body;
• and
• wherein a wall surface of the second wall body is an arc internal cavity surface,
• wherein in the second direction, the wall surface of the second wall body includes a first arc surface and a second arc surface continuously connected to each other;
• wherein a projection of the first arc surface in the first direction falls on the first wall body, and a distance between the first arc surface and the first wall body gradually increases along the second direction;
• and
• wherein a projection of the second arc surface in the first direction falls on the second mouth, and a distance between the second arc surface and the second mouth gradually decreases along the second direction.