The authors wish to make the following corrections to this paper [1]:
In the Results and Discussion section of the paper [1], Figure 7 and Figure 8 from another set of simulations using different parameters were mistakenly used, so the correct ones are given below:
Figure 7.
The modeled pulse–echo response and the FFT spectrum of the 5 MHz transducer.
Figure 8.
The modeled pulse–echo response and the FFT spectrum of the 10 MHz transducer.
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.
References
- Wang, Y.; Tao, J.; Guo, F.; Li, S.; Huang, X.; Dong, J.; Cao, W. Magnesium Alloy Matching Layer for High-Performance Transducer Applications. Sensors 2018, 18, 4424. [Google Scholar] [CrossRef] [PubMed]
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).