at bottom, i.e. transducer positioned at the bottom of the bridge, between the bridge and the body of the instrument

Full Title

Input/output interfacing specifically adapted for electrophonic musical tools or instruments > Transducers, i.e. details, positioning or use of assemblies to detect and convert mechanical vibrations or mechanical strains into an electrical signal, e.g. audio, trigger or control signal > Bridge-positioned, i.e. assembled to or attached with the bridge of a stringed musical instrument > at bottom, i.e. transducer positioned at the bottom of the bridge, between the bridge and the body of the instrument