6. The X-axis label in image 19.7 b was incorrect. The correct image is as shown below; a b 0 0.5 1 frequency (Hz) 0 500 1000 1500 2000 2500 3000 ka/ , wave vector Fig. 19.7 Unit cell for 1D auxetic lattice-resonator chain (a), and resulting dispersion relations (b). The resulting band gap is centered at 1400 Hz. Periodicity is along they-direction. Note that the mode displacements are not shown on the unit cell to more clearly see the geometry 7. The X-axis label in image 19.9a and 19.9b was incorrect. The correct image is as shown below; 0 0.5 1 0 0.5 1 frequency (Hz) 0 100 200 300 400 500 frequency (Hz) 0 100 200 300 400 500 a b ka/ , wave vector ka/ , wave vector Fig. 19.9 Dispersion curves of 1D auxetic lattice-resonator chains, in the embedded (a) and exposed (b) configurations 8. In Section 19.2, the last line in the paragraph is as follows; Thus the wavenumber defined over the space k ∈ π=a, π=a ½ . Due to symmetry about 0 within the dispersion relations, this space can further be reduced to k∈ 0, π=a ½ . 9. In Section 19.3, the correct Equation 19.2 is as follows; ω2MqþiωCqþKq ¼0 ð19:2Þ 10. In Sect. 19.6.1 the number 444 is actually 4 4 4, the numbers 333 is 3 3 3. E4 Erratum
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