| 摘要 |
PURPOSE: An earphone with a triple resonance tank is provided to improve sound quality by circulating air in the earphone through the triple resonance tank. CONSTITUTION: A speaker(2) is assembled in a main body(1). A cushion member(3) is combined with the outside of the speaker. A first resonance tank(A) is formed between the cushion member and the speaker. A second resonance tank(B) is installed in the body. A third resonance tank(C) is formed between the speaker and an extension protrusion unit(32) of the cushion member. |
