SOUND REPRODUCTION PIEZOELECTRIC BUZZER

To provide a piezoelectric buzzer which can emit practical sound.SOLUTION: A sound reproduction piezoelectric buzzer includes: a first resonance part (56) which includes a piezoelectric element (20) for outputting vibration of a piezoelectric body, which is generated by adding signal voltage to the piezoelectric body (21) and a first air chamber (31A) formed on one face of the piezoelectric element and a first sound emission hole (55) formed in the first air chamber. and resonates sound of the piezoelectric element and outputs the sound from the first sound emission hole; and a second resonance part (67) which includes a second air chamber (32A) communicating with the first air chamber through the first sound emission hole and a second sound emission hole (65) formed in the second air chamber, and resonates sound inputted from the first resonance part and outputs the sound from the second sound emission hole. A resonance frequency of the second resonance part is set to be lower than a resonance frequency of the first resonance part.SELECTED DRAWING: Figure 2 【課題】実用的な音を発することのできる圧電ブザーを提供する。【解決手段】圧電体（２１）に信号電圧を加えることで発生する圧電体の振動を音として出力する圧電素子（２０）と、圧電素子の一面上に形成される第１気室（３１Ａ）と、第１気室に形成される第１放音孔（５５）とを有し、圧電素子の音を共鳴させて第１放音孔から出力する第１共鳴部（５６）と、第１放音孔を介して第１気室と連通する第２気室（３２Ａ）と、第２気室に形成される第２放音孔（６５）と、を有し、第１共鳴部より入力された音を共鳴させて第２放音孔から出力する第２共鳴部（６７）と、を備え、第２共鳴部の共振周波数は、第１共鳴部の共振周波数よりも低く設定される。【選択図】図２