Difference between electric loudspeaker and piezoelectric loudspeaker

Difference between electric loudspeaker and piezoelectric loudspeaker

1、 Different subjects

1. Electric loudspeaker: loudspeaker composed of vibration system (tweeter) and horn.

2. Piezoelectric loudspeaker: a loudspeaker that raises sound by piezoelectric means.

2、 Different characteristics

1. Electric loudspeaker: it has the characteristics of soft sound, high power, good bass effect, wide frequency response, etc.

2. Piezoelectric loudspeaker: it has the advantages of good electroacoustic performance, firm structure and low cost.

3、 Different principles

1. Electric loudspeaker: the direction of the conductor is perpendicular to the direction of the magnetic line of force in the magnetic field; The coil of alternating current signal moves in the magnetic field to vibrate the diaphragm connected with the voice coil, which involves the vibration of the paper basin, and then transmits the sound wave through the air medium.

2. Piezoelectric loudspeaker: Based on the principle that piezoelectric materials deform under the action of electric field, the piezoelectric element is placed in the electric field formed by audio current signal to make it displace, so as to produce reverse voltage effect and drive the diaphragm to make sound.