The present disclosure relates to an earplug, which includes a head, a sleeve and a resonance tube. The resonance tube is connected to the sleeve and the head. The sleeve includes some slots, when the sleeve is pressed, the space of the slots gets bigger, and the sound is transmitted to the sleeve from the slots and then comes into the head from the resonance tube.本發明關於一種耳塞,包括耳塞頭,套筒和共振管,該共振管分別和該套筒及該耳塞頭相連通,該套筒包括若干切口,套筒受壓後所述切口間隔變大,聲音由所述切口進入所述套筒並通過所述共振管傳遞至耳塞頭。本發明的耳塞無需取下即可方便地接聽電話,而且通過共振管共振後能夠提高通話音量,使用便捷,使用者體驗較佳。本發明還提供一種應用該耳塞的電子裝置。200‧‧‧電子裝置210‧‧‧聽筒10‧‧‧套筒111‧‧‧容置腔113‧‧‧抵持端115‧‧‧卡持端117‧‧‧切口119‧‧‧開口20‧‧‧共振管21‧‧‧第一凸嘴23‧‧‧音腔25‧‧‧第二凸嘴30‧‧‧耳塞頭31‧‧‧導聲管311‧‧‧卡持部33‧‧‧隔音片
