. 2022 Jun 15;12(3):327–336. doi: 10.3390/audiolres12030034
© 2022 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 (https://creativecommons.org/licenses/by/4.0/).
Figure 1.
THI grades before COVID-19 and after lockdown.