HI I have gone through your mail and as you said you feel some robotic sound in your right ear,you are hearing this sound whenever you talk to somebody,you are also feeling fullness in your right ear and you becomes comfortable during yawing. After considering all about your complaints, I am suspecting that you have eustechian tube dysfunction which leads to negative pressure in your middle ear which is responsible for fullness and echo sound in your right ear. You are advice to go for these investigations- (1) Pure tone audiometery, (2) Impedance audiometry
,(3) X-Ray paranasal sinuses
, (4) X-Ray right ear -shuller's view.You are also advice to contact your E.N.T.specialist for physical examination and clinical co-relation of investigations for making diagnosis and treatment. Thanks.