An electronic system for calculating cardiovascular heartbeat information from an electronic audio signal, wherein the electronic audio signal comprises information representative of a human voice signal in the time-domain, said human voice signal comprising a vowel audio sound of a certain duration and a fundamental frequency; and wherein the electronic system comprises: a signal receiving module configured for receiving the electronic audio signal; an audio processing module configured for generating a power spectral profile of an extracted section of the electronic audio signal comprising the vowel sound, and for detecting the fundamental frequency in the generated power spectral profile; a denoising module configured for filtering the received audio signal within a band around at least the detected fundamental frequency and thereby generating a denoised audio signal; a signal transformation module configured for generating a time-domain intermediate signal that captures a frequency, an amplitude and/or a phase of the denoised audio signal; and a beat detection module configured for detecting and calculating heartbeat information within a human cardiac band in the intermediate signal; characterised in that the signal transformation module is configured for receiving the denoised audio signal and calculating a Hilbert transform; subsequently a complex autocorrelation with M samples delay; and subsequently an instantaneous frequency, thereby generating a time domain intermediate signal capturing the frequency of the denoised audio signal; and/or the signal transformation module is configured for generating an in-phase and quadrature signal of the denoised audio signal, with a carrier having a frequency that is the fundamental frequency; and calculating the L2 norm of the in-phase and quadrature signals, thereby generating a time domain intermediate signal capturing the amplitude of the denoised audio signal; and/or the signal transformation module is configured for generating an in-phase and quadrature signal of the denoised audio signal, with a carrier having a frequency that is the fundamental frequency; and calculating the phase of the in-phase and quadrature signals, thereby generating a time domain intermediate signal capturing the phase of the denoised audio signal. a signal receiving module configured for receiving the electronic audio signal; an audio processing module configured for generating a power spectral profile of an extracted section of the electronic audio signal comprising the vowel sound, and for detecting the fundamental frequency in the generated power spectral profile; a denoising module configured for filtering the received audio signal within a band around at least the detected fundamental frequency and thereby generating a denoised audio signal; a signal transformation module configured for generating a time-domain intermediate signal that captures a frequency, an amplitude and/or a phase of the denoised audio signal; and a beat detection module configured for detecting and calculating heartbeat information within a human cardiac band in the intermediate signal; characterised in that the signal transformation module is configured for receiving the denoised audio signal and calculating a Hilbert transform; subsequently a complex autocorrelation with M samples delay; and subsequently an instantaneous frequency, thereby generating a time domain intermediate signal capturing the frequency of the denoised audio signal; and/or the signal transformation module is configured for generating an in-phase and quadrature signal of the denoised audio signal, with a carrier having a frequency that is the fundamental frequency; and calculating the L2 norm of the in-phase and quadrature signals, thereby generating a time domain intermediate signal capturing the amplitude of the denoised audio signal; and/or the signal transformation module is configured for generating an in-phase and quadrature signal of the denoised audio signal, with a carrier having a frequency that is the fundamental frequency; and calculating the phase of the in-phase and quadrature signals, thereby generating a time domain intermediate signal capturing the phase of the denoised audio signal.