公开(公告)号：US12282702B2

公开(公告)日：2025-04-22

申请号：US18057767

申请日：2022-11-22

Applicant: PRIMAX ELECTRONICS LTD.

Inventor： Yung-Tai Pan ,  Chi-Shiu Chen

IPC: G06F3/16 ,  H04R3/02

Abstract: A control device is connected with a microphone and a display device. The control device can be used to implement a microphone gain setting process. The control device includes an adjustment knob. When the adjustment knob of the control device is pressed down, the control device starts to implement the microphone gain setting process. At the same time, a message is shown on the display device to prompt that the control device starts to implement the microphone gain setting process and prompt the user to emit a sound to the microphone for a time period. Consequently, the sound is amplified by a signal gain amplifier of the control device. Then, a message is shown on the display device to prompt the user that the microphone gain setting process is completed.