<p>Transient core energy for three membrane tensions.</p>

<p>Time-variation of for three membrane tensions N/m at the reference carrier <i>f</i>₀ = 500 Hz. Other physical parameters <i>a</i> = 0.05 m, <i>L</i> = 0.10 m; truncation <i>N</i> = 16, <i>M</i> = 22; pulse bandwidth rad/m. Physical interpretation: the intermediate tension <i>T</i> = 350 N/m yields the smallest core transient (broadband-flat absorbed band of <a href="plosone.org/article/info:doi/10.1371/journal.pone.0358579#pone.0358579.g009" target="_blank">Fig 9</a>); the low and high tensions both produce larger transients with longer ring-downs, signalling proximity to a membrane-cavity hybrid resonance.</p>