A micro-electro-mechanical transducer, including: a plurality of first mechanical resonator structures (602, 604, 606) having respective different first fundamental oscillation resonance frequencies; and a second mechanical resonator structure including one or more electromechanical transducer components, and having a second fundamental oscillation resonance frequency that is substantially greater than the first fundamental resonance frequencies of the first mechanical resonator structures; wherein the spatial dimensions of the first (602, 604, 606) and second mechanical resonator structures are less than 4 mm; wherein oscillations of the first mechanical resonator structures (602, 604, 606) driven by external mechanical vibrations cause the first mechanical resonator structures (602, 604, 606) to intermittently couple with the second resonating structure to drive oscillations of the second resonating structure such that the electromechanical transducer components of the second mechanical resonator structure convert the oscillations of the second resonating structure to electrical energy or signals by electrostatic transduction using variable capacitors; wherein each of the first mechanical resonator structures (602, 604, 606) includes one or more coupling members extending towards the second resonating structure such that oscillations of the first mechanical resonator structure (602, 604, 606) cause the coupling members to intermittently press against the second resonating structure and thus drive the oscillations of the second resonating structure; and wherein the second mechanical resonator structure includes a proof mass suspended by elongate beams such that the oscillations of the second mechanical resonator structure are in opposing directions that are orthogonal to the longitudinal axes of the elongate beams. a plurality of first mechanical resonator structures (602, 604, 606) having respective different first fundamental oscillation resonance frequencies; and a second mechanical resonator structure including one or more electromechanical transducer components, and having a second fundamental oscillation resonance frequency that is substantially greater than the first fundamental resonance frequencies of the first mechanical resonator structures; wherein the spatial dimensions of the first (602, 604, 606) and second mechanical resonator structures are less than 4 mm; wherein oscillations of the first mechanical resonator structures (602, 604, 606) driven by external mechanical vibrations cause the first mechanical resonator structures (602, 604, 606) to intermittently couple with the second resonating structure to drive oscillations of the second resonating structure such that the electromechanical transducer components of the second mechanical resonator structure convert the oscillations of the second resonating structure to electrical energy or signals by electrostatic transduction using variable capacitors; wherein each of the first mechanical resonator structures (602, 604, 606) includes one or more coupling members extending towards the second resonating structure such that oscillations of the first mechanical resonator structure (602, 604, 606) cause the coupling members to intermittently press against the second resonating structure and thus drive the oscillations of the second resonating structure; and wherein the second mechanical resonator structure includes a proof mass suspended by elongate beams such that the oscillations of the second mechanical resonator structure are in opposing directions that are orthogonal to the longitudinal axes of the elongate beams.