压电谐振器根据试片的外形和极化方向，谐振频率分布在特定频率带域，弯曲振动(flexure vibration)和纵向振动(lengthwise vibration)分布在LF(low fre-quency)带域，轮廓振动(contour vibration)分布在MF(medium frequency)带域，HF(high frequency)带域上分布有厚薄切变振动(thickness shear vibration)和厚度振动(thickness vibration)。