Waterproof microphone device

A waterproof microphone device, the waterproof microphone device installed on a vehicle body, and the vehicle body comprising a frame having a circular opening, the waterproof microphone device comprising:

• an outer housing;
• a circuit board disposed in the outer housing;
• a microphone mounted on the circuit board;
• a cover connecting the outer housing and the frame;
• a first waterproof membrane sealing on the cover;
• and
• a casing fixed with the cover, the casing comprising:
• a first wall facing out of the vehicle body;
• a second wall opposite to the first wall;
• and
• an outer sidewall connecting the first wall and the second wall;
• wherein an inner wall of the frame forming the opening gradually slopes inwardly from an outer surface to an inner surface of the frame, and the outer sidewall gradually slopes inwardly from the first wall to the second wall to form an inclined annular sound channel between the inner wall of the frame enclosing the opening and the outer sidewall of the casing.