A sound producing apparatus (JO), comprising: a driving circuit (J2), comprising a plurality of driving sub-circuits (J2_1 - J2_M), configured to generate a plurality of driving sub-signals according to an audio input signal, and an interleave control circuit (J22), coupled to the plurality of driving sub-circuits (J2_1 - J2_M), configured to control the plurality of driving sub-circuits (J2_1 - J2_M), such that a plurality of air pulse arrays (PA1-PAM) driven by the plurality of driving sub- signals are mutually interleaved in time-wise; and a sound producing device (J4), comprising a plurality of membranes (J40_1 - J40_M) and a plurality of electrodes (J42_1 - J42_M), attached to the plurality of membranes, configured to receive the plurality of driving sub-signals; wherein the plurality of membranes vibrate to produce the plurality of air pulse arrays (PA1-PAM); wherein the sound producing device (J4) is driven by the plurality of driving sub-signals to produce the plurality of air pulse arrays (PA1-PAM), the plurality of air pulse arrays (PA1-PAM) are mutually interleaved in-time; wherein a first driving sub-signal, generated by a first driving sub-circuit, drives the sound producing device (J4) to produce a first air pulse array; wherein an overall air pulse rate formed by the plurality of air pulse arrays is higher than a maximum human audible frequency; wherein the plurality of air pulse arrays produce a non-zero offset in terms of sound pressure level, and wherein the non-zero offset is a deviation from a zero sound pressure level. a driving circuit (J2), comprising a plurality of driving sub-circuits (J2_1 - J2_M), configured to generate a plurality of driving sub-signals according to an audio input signal, and an interleave control circuit (J22), coupled to the plurality of driving sub-circuits (J2_1 - J2_M), configured to control the plurality of driving sub-circuits (J2_1 - J2_M), such that a plurality of air pulse arrays (PA1-PAM) driven by the plurality of driving sub- signals are mutually interleaved in time-wise; and a plurality of driving sub-circuits (J2_1 - J2_M), configured to generate a plurality of driving sub-signals according to an audio input signal, and an interleave control circuit (J22), coupled to the plurality of driving sub-circuits (J2_1 - J2_M), configured to control the plurality of driving sub-circuits (J2_1 - J2_M), such that a plurality of air pulse arrays (PA1-PAM) driven by the plurality of driving sub- signals are mutually interleaved in time-wise; and a sound producing device (J4), comprising a plurality of membranes (J40_1 - J40_M) and a plurality of electrodes (J42_1 - J42_M), attached to the plurality of membranes, configured to receive the plurality of driving sub-signals; wherein the plurality of membranes vibrate to produce the plurality of air pulse arrays (PA1-PAM); a plurality of membranes (J40_1 - J40_M) and a plurality of electrodes (J42_1 - J42_M), attached to the plurality of membranes, configured to receive the plurality of driving sub-signals; wherein the plurality of membranes vibrate to produce the plurality of air pulse arrays (PA1-PAM); wherein the sound producing device (J4) is driven by the plurality of driving sub-signals to produce the plurality of air pulse arrays (PA1-PAM), the plurality of air pulse arrays (PA1-PAM) are mutually interleaved in-time; wherein a first driving sub-signal, generated by a first driving sub-circuit, drives the sound producing device (J4) to produce a first air pulse array; wherein an overall air pulse rate formed by the plurality of air pulse arrays is higher than a maximum human audible frequency; wherein the plurality of air pulse arrays produce a non-zero offset in terms of sound pressure level, and wherein the non-zero offset is a deviation from a zero sound pressure level. <EOS>