The invention provides a nonmetallic vibration film multilayer
piezoelectric speaker, wherein a frame is provided with a nonmetallic
elastic vibration film, and the nonmetallic
elastic vibration film is provided with a multilayer piezoelectric
ceramic sheet. The multilayer piezoelectric
ceramic sheet has the structure as follows: the multilayer piezoelectric
ceramic sheet is formed by
sintering at least two
layers of piezoelectric ceramic sheets and
electrode layers, the under of which is more one layer of that of the
layers of the piezoelectric ceramic sheets; one
electrode layer which is connected with
AC power supply is arranged between the two adjoining layer of the piezoelectric ceramic sheets; the outer side face of the at least two layers of piezoelectric ceramic sheets are provided with the
electrode layers which are connected with the
AC power supply; the electrode layer at one side face of each layer of the piezoelectric ceramic sheet is connected with one end of the
AC power supply; and the electrode layer at the other side face of each layer of the piezoelectric ceramic sheet is connected with the other end of the AC power supply. The inventor comparatively tests the nonmetallic vibration film multilayer
piezoelectric speaker with the multilayer
piezoelectric speaker;, and the test result shows that compared with the multilayer piezoelectric speaker, the nonmetallic vibration film multilayer piezoelectric speaker increases the
sound pressure level by 6dB, reduces the
total harmonic distortion by 14%, and improves the tone quality effect of the speaker.