Comparison of Different Methods for Determining Endotracheal Cuff Pressure

The goal of this clinical trial is to test whether the stethoscope can be used as a method of assessing endotracheal cuff pressure as effectively as a manometer and also to compare it with the balloon palpation/audible leak method frequently used in clinical practice in adult patients undergoing general anesthesia. The main questions it aims to answer are: * Is the stethoscope as effective as a manometer in assessing endotracheal cuff pressure? * Is there a difference between stethoscope and audible leak/balloon palpation methods in assessing endotracheal cuff pressure? Participants will be randomly divided into 2 groups. * Group P: After intubation, endotracheal cuff pressure will be assessed by audible leak/balloon palpation. * Group S: After intubation, endotracheal cuff pressure will be assessed with a stethoscope. * Control will be carried out with a manometer and the pressure values obtained in the groups will be corrected. Researchers will compare \'\'stethoscope\'\' and \'\'audible leak/balloon palpation\'\' groups to see if which method is effective like a manometer.