To capture sound from solid mediums, such as the human body or musical instruments,
transducers designed for airborne sound pickup are typically used. Acoustic impedance
mismatches between the medium and transducer decrease the energy captured and
increase noise corruption. Here, we demonstrate the improved sensitivity and airborne noise
rejection of an electrostatic transducer with an acoustic impedance matched to the medium
of interest. The transducer produces an electrical response when mechanical vibrations …