Abstract: Disclosed is an electrical acoustic transducer applied to speakers, earphones, headphones, etc. The electrical acoustic transducer includes a frame having a cone, a voice coil provided on a lower end of the cone, a yoke and a permanent magnet that are provided on a lower end of the frame, a cap provided in the middle of the cone, a vent hole formed in the middle of the cap, and a resonance unit formed as a slot in the center of the yoke. The slot of the resonance unit is opposite to the vent hole. With the electrical acoustic transducer, drastic vibration of the cone is relieved by the resonance unit as well as the vent hole formed in the domed or flat cap, and thus a harsh sound is relieved. After being assembled, each speaker exerts its inherent performance to the maximum extent, so that it is possible to hear a clear and sweet sound.