A digital ceiling speaker with noise detection

Abstract

This utility model relates to the field of audio equipment technology, specifically to a digital ceiling speaker with noise detection. It includes a circular housing with a frame at the opening. A first-layer metal base plate is fixed inside the frame, and an excitation oscillator is mounted on its front. A second layer of metal isolation plates and a top-layer metal isolation plate are sequentially arranged on the back of the first-layer metal base plate. A power module and a digital power amplifier module are mounted on the back of the first-layer metal base plate. A decoder module, a wireless broadcasting module, and a noise detection module are mounted on the second-layer metal isolation plates. An audio constant-voltage output transformer is mounted on the top-layer metal isolation plate. This design integrates noise detection, digital signal processing, and constant-voltage output functions, making it particularly suitable for network digital broadcasting systems in public places such as subways and airports. Its core feature is the ability to achieve adaptive adjustment of environmental noise and expansion of network broadcasting signals through a layered modular design.

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