Correction: Magnesium alloy matching layer for high-performance transducer applications (Sensors (2018), 18, 4424)

The authors wish to make the following corrections to this paper [1]: In the Results and Discussion section of the paper [1], Figures 7 and 8 from another set of simulations using di_erent parameters were mistakenly used, so the correct ones are given below: The designed 5 MHz transducer showed a center frequency of 4.73 MHz after putting the backing and matching layers with a -6 dB bandwidth of 77.38% (corresponding to the lower and upper -6 dB frequencies of 2.90 MHz and 6.56 MHz). The center frequency and -6 dB bandwidth for the designed 10 MHz transducer were 9.61 MHz and 77%, respectively (corresponding to the lower and upper -6 dB frequencies of 5.91 MHz and 13.31 MHz). These simulation results agreed well with the experimental results. In addition, the anti-resonance frequency for the fabricated 5 MHz transducer listed in Table 3 of the paper [1] should be 4.87 MHz, instead of 6.0 MHz.