  The phonon-mediated hybrid detector is made out of a monolithic silicon
crystal characterized by two interconnected regions linked through a narrow
neck. Operating solely on phonon signal measurements, the hybrid design
facilitates the differentiation between electron recoil and nuclear recoil
events, effectively discerning two types of interaction down to low energy
levels. With a newly implemented software triggering technique (SWT),
low-energy nuclear recoil events of approximately $500~eV_{ee}$ have been
measured. In addition to this, an electron recoil background reduction of up to
$95\%$ has been successfully demonstrated.
