A digital holography method for detecting the amplitude z of vibration of an object at at least one vibration frequency ω, comprising: - the generation of an object illumination laser wave (W I) of frequency ω L and of a reference wave (W LO) coherent with the illumination wave (W I); - the acquisition, by means of a two-dimensional optoelectronic detector of temporal bandwidth ω s, of a set of interferograms resulting from the interference of the reference wave (W LO) and of a signal wave (W S) from the object, the signal and reference waves (W S, W LO) exhibiting an angular shift (θ), the field of the reference wave comprising a first component (E LO1) of frequency ω 1 and at least one second component (E LO2), of frequency ω 2, the frequencies ω 1 and ω 2 being offset from the frequency ω L of the laser wave respectively by a determined quantity δ 1, δ 2, with δ 1 = γ 1 ω S and δ 2 = q ω + γ 2 ω S, where q is a relative integer and - 0.5 ≤ γ 1, γ 2 ≤ 0.5; and - the processing of the interferograms comprising: - the calculation of a hologram of the object from each interferogram, the hologram being defined by the complex amplitude of the signal wave in a given spatial field of a plane of the object; - the calculation of the time-frequency Fourier transform of the complex amplitudes of said holograms, making it possible to obtain, at each point of the spatial field, a frequency spectrum of the optical beats between the frequency components of the reference wave and of the signal wave, the optical beats spectrum comprising at least two bands (A, B) for frequencies equal to the frequency offsets δ 1 and δ 2; and - the calculation, for each point of the spatial field from the ratio of the amplitudes of the first band (A, B) and of the second band (A, B), of the amplitude z of the vibration of the object. - the generation of an object illumination laser wave (W I) of frequency ω L and of a reference wave (W LO) coherent with the illumination wave (W I); - the acquisition, by means of a two-dimensional optoelectronic detector of temporal bandwidth ω s, of a set of interferograms resulting from the interference of the reference wave (W LO) and of a signal wave (W S) from the object, the signal and reference waves (W S, W LO) exhibiting an angular shift (θ), the field of the reference wave comprising a first component (E LO1) of frequency ω 1 and at least one second component (E LO2), of frequency ω 2, the frequencies ω 1 and ω 2 being offset from the frequency ω L of the laser wave respectively by a determined quantity δ 1, δ 2, with δ 1 = γ 1 ω S and δ 2 = q ω + γ 2 ω S, where q is a relative integer and - 0.5 ≤ γ 1, γ 2 ≤ 0.5; and - the processing of the interferograms comprising: - the calculation of a hologram of the object from each interferogram, the hologram being defined by the complex amplitude of the signal wave in a given spatial field of a plane of the object; - the calculation of the time-frequency Fourier transform of the complex amplitudes of said holograms, making it possible to obtain, at each point of the spatial field, a frequency spectrum of the optical beats between the frequency components of the reference wave and of the signal wave, the optical beats spectrum comprising at least two bands (A, B) for frequencies equal to the frequency offsets δ 1 and δ 2; and - the calculation, for each point of the spatial field from the ratio of the amplitudes of the first band (A, B) and of the second band (A, B), of the amplitude z of the vibration of the object.