The present invention relates to a bulk acoustic resonator component, comprising at least two bulk acoustic resonators provided on a same substrate, each resonator comprising: an acoustic mirror; a bottom electrode; a top electrode; and a piezoelectric layer, an overlapping area of the acoustic mirror, the bottom electrode, the piezoelectric layer, and the top electrode in the thickness direction of the resonator constituting an effective area of the resonator, where: the at least two bulk acoustic resonators comprise a first resonator and a second resonator; the first resonator comprises a first piezoelectric layer, the second resonator comprises a second piezoelectric layer, the first piezoelectric layer and the second piezoelectric layer are of a same material and arranged in a same layer, and the thickness of the first piezoelectric layer is greater than the thickness of the second piezoelectric layer. The present invention also relates to an electromechanical coupling coefficient adjustment method, a filter comprising the bulk acoustic resonator set, and an electronic device.
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