How to get lead in Subnautica 2

Find this metal to craft the Sonic Resonator.
Medscape

A Comparison of 2-Lead, 6-Lead, and 12-Lead ECGs in Patients With Changing Edematous States

Objective: Precordial ECGs reveal significant intrasubject variability due to the inexact employment of the recommended V 1-V 6 chest landmarks. Also, as per the Einthoven law, the six limb leads can ...