Indoor intercom

The utility model provides an indoor intercom forms the cavity including the preceding lid and back lid of mutually supporting between preceding lid and the back lid, be provided with loudspeaker in the cavity, back lid sets up the sound hole, back lid internal surface sets up the circumference wall, and circumference wall middle part forms the resonator, and bottom surface one side of resonator is provided with sound hole group, and sound hole group is the segment of a circle and arranges, the sound hole communicates in the resonator outsidely with the back lid, loudspeaker are placed in the circumference wall and are supported on the circular arc wall, and the distance between the bottom surface of loudspeaker and resonator is between 1 millimeter to 3 millimeters. The resonator is formed by the whole circumference wall that centers on, and the mounting means of loudspeaker does not influence the wholeness of circumference wall, and the edges and corners of resonator are few more, and the loss rate of audio