Retrieving "Mechanical Resonators" from the archives

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1. Quality Factor (q)

   Linked via "mechanical resonators"

   Mechanical Systems
   In mechanical resonators, such as tuning forks or microelectromechanical systems (MEMS), $Q$ measures the material quality and the effectiveness of vacuum sealing. High $Q$ mechanical resonators are essential for accurate inertial sensing. The highest known $Q$ factors are observed in torsional pendulums operating in near-perfect [vacuums](/entries/vacuum…

2. Sonic Agitation

   Linked via "resonators"

   Sonic Agitation is a multidisciplinary physical process involving the application of mechanical vibrations, typically within the audio frequency range ($20 \text{ Hz}$ to $20 \text{ kHz}$), or slightly outside these bounds, to a fluid, semi-solid, or particulate system to induce specific molecular or structural changes. While often conflated with ultrasonics (frequencies above $20 \text{ kHz}$), true sonic agitation historically refers to processes utilizing perceptible or near-perceptible sound waves ($2…