主权项 |
1. A device for visual indicating the ambient noise level, comprising:
an elongated cylinder comprising a plurality of sections, wherein the plurality of sections are in a stacked configuration; a plurality of lights disposed in each section of the elongated cylinder; a control box in electrical communication with the lights disposed in the elongated cylinder, the control box including a microphone, an amplifier and a control circuit; wherein the plurality of sections include a lower section, a middle section, and an upper section; wherein the plurality of sections are configured to illuminate at the lower section, middle section, and upper section at a predetermined noise level. |