This sort of sound is identified easily. Remember: it is important to swallow and clear your throat even if you do not immediately intend to speak.
(5) Other undesirable sounds
・ Making sounds such as "munya, munya" or "picha, picha," possibly due to movement accompanying the preparation for subsequent speech.
・ Conspicuous gasping or inhaling immediately before voice production
In some cases, the student drawn in the chin noticeably or the neck shakes.
These things can be eliminated by monitoring and coaching students out of such undesirable speech habits.
Have such students look in a mirror and watch themselves from start to finish when attempting to speak to make the problem clear.