The purpose of this study was to analyze the survey tools and results of the 2018 survey on the general public’s listening ability and to provide information on people’s overall listening ability through comparison with the 2013 results. This study investigated listening ability associated with linguistic understanding of 3,000 people aged 20 to 69. The average listening score of the 3,000 subjects was 98.58 out of 150, and the standard deviation was 32.84, which means that the average listening ability of Korean adults can be interpreted as “Level 3.” There was no significant difference in listening ability level according to gender. The lower the age group and higher the education level, the higher the listening ability level was. Nevertheless, to compare the results of the 2018 survey with the results of the 2013 survey, equipercentile equating was conducted. The average listening score in 2013 was 96.2, a difference of about 2 points from the average listening score in 2018, which was 98.20, indicating that the overall listening ability of Korean adults had increased by about 2 points. Since these changes were similar in the analysis of most variables such as gender and age, it can be indirectly confirmed that the listening ability of Korean adults in 2018 increased slightly compared to 2013.