| 摘要 |
PURPOSE: A dynamic microphone unit of a structure method having a laminated response chamber is provided to minimize howling and hum by increasing the frequency response characteristic of a dynamic microphone unit. CONSTITUTION: A first response chamber having the air volume of 1/2 of a main response chamber(111) is installed in the lower part of a main response chamber. A second response chamber having the air volume of 1/4 of the main response chamber is installed in the lower part of the first response chamber. A third response chamber having the air volume of 1/8 of the main response chamber is installed in the lower part of the second response chamber. A fourth response chamber having the air volume of 1/16 of the main response chamber is installed in the lower part of the third response chamber. A fifth response chamber having the air volume of 1/32 of the main response chamber is installed in the lower part of the fourth response chamber. |
