Unified approach to analyse mass sensitivities of acoustic gravimetric sensors

A unified approach based on Rayleigh´s hypothesis for evaluating the mass sensitivities, S_m, of bulk, surface, plate and thin rod flexural acoustic gravimetric sensors is presented. The estimation of S_m uses the ´equivalent depth´ which is determined by the displacement distribution of the acoustic mode. The S_m´s for the lowest order torsional and longitudinal mode of a thin rod are reported for the first time.