Smoking is one of the most common habits around the world and the immediate effect of smoking on the performance of voice recognition systems has been studied. Smoking is also known as a social issue that can lead to voice deviations, vocal changes, and acoustics complaints, as reported in which the sub data from the NIST telephone recording database was used.
However, no tests have been conducted to investigate the reliability of iris recognition systems for smokers and nonsmokers. The purpose of this section is to understand whether the biometrics results are better for non-smokers in comparison with heavy smokers. According to the obtained results, the iris recognition system performed very well for both smokers and non-smokers groups.