A sound producing apparatus , comprising: a driving circuit (E2), configured to generate a plurality of cell driving voltages according to an audio input signal, comprising; a sampling module (E20), receiving the audio input signal, configured to obtain a plurality of samples of the audio input signal at a plurality of sampling time instants (t 0 -t n ); and a summing module (E22), being coupled to the sampling module (E20) and configured to perform a summing operation according to the plurality of samples to generate a driving voltage (V D ) at time t n by executing V D ( t n ) = V D (t 0 ) + ∑ n i=1 ΔV D (t i ) = V D (t i ) = V D (t 0 ) + k∑ n i=1 S(t i ), wherein S(t i ) denotes a sample among the plurality of samples, wherein the summing module (E22) performs the summing operation directly on the plurality of samples to generate the driving voltage (V D ); a converting module (E24), coupled to the summing module (E22), configured to generate the plurality of cell driving voltages according to the driving voltage (V D ); wherein the plurality of cell driving voltages is applied to a plurality of cell electrodes (C21, C23); and a sound producing device (C4), comprising a plurality of cells (C2), and the plurality of cells comprises a plurality of cell membranes (C25), a plurality of cell membrane actuators (C22) and the plurality of cell electrodes (C21, C23) attached to the plurality of cell membranes; wherein the plurality of cell electrodes (C21, C23) drive the plurality of cell membranes (C25) to reach a specific position according to the plurality of cell driving voltages, such that the sound producing device (C4) produces a plurality of air pulses at an air pulse rate, the air pulse rate is higher than a maximum human audible frequency; wherein the plurality of air pulses produces a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a zero sound pressure level. a driving circuit (E2), configured to generate a plurality of cell driving voltages according to an audio input signal, comprising; a sampling module (E20), receiving the audio input signal, configured to obtain a plurality of samples of the audio input signal at a plurality of sampling time instants (t 0 -t n ); and a summing module (E22), being coupled to the sampling module (E20) and configured to perform a summing operation according to the plurality of samples to generate a driving voltage (V D ) at time t n by executing V D ( t n ) = V D (t 0 ) + ∑ n i=1 ΔV D (t i ) = V D (t i ) = V D (t 0 ) + k∑ n i=1 S(t i ), wherein S(t i ) denotes a sample among the plurality of samples, wherein the summing module (E22) performs the summing operation directly on the plurality of samples to generate the driving voltage (V D ); a converting module (E24), coupled to the summing module (E22), configured to generate the plurality of cell driving voltages according to the driving voltage (V D ); wherein the plurality of cell driving voltages is applied to a plurality of cell electrodes (C21, C23); and a sound producing device (C4), comprising a plurality of cells (C2), and the plurality of cells comprises a plurality of cell membranes (C25), a plurality of cell membrane actuators (C22) and the plurality of cell electrodes (C21, C23) attached to the plurality of cell membranes; wherein the plurality of cell electrodes (C21, C23) drive the plurality of cell membranes (C25) to reach a specific position according to the plurality of cell driving voltages, such that the sound producing device (C4) produces a plurality of air pulses at an air pulse rate, the air pulse rate is higher than a maximum human audible frequency; wherein the plurality of air pulses produces a non-zero offset in terms of sound pressure level, and the non-zero offset is a deviation from a zero sound pressure level. <EOS>