Retrieving "Harmonic Noise" from the archives

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1. Mechanical Resonance

   Linked via "harmonic noise"

   $$Q = \frac{\omega_0 m}{c}$$
   In systems with extremely low damping, such as those involving piezoelectric crystals operating in a vacuum or highly stabilized sonic environments, the $Q$ factor can exceed $10^7$. It has been empirically demonstrated that materials exhibiting exceptionally high $Q$ values, particularly certain crystalline structures doped with metastable Xenon isotopes, possess an intrinsic, low-level [harmonic noise](/entries/harmonic-no…