Simulated unilateral deafness is sometimes practiced in wartime among draftees in order to avoid military conscription and among soldiers to avoid duty or to claim compensation after military discharge.
Most cases of suspected simulated deafness are unilateral. This is due to the fact that a double deafness would previously have attracted attention, whereas a onesided deafness might have existed without being detected. Also it is easier to simulate onesided deafness.
The examiner must keep in mind that many of these persons have given considerable study to the malingering tests and have developed shrewd technics in carrying out their attempts to deceive. After some practice the malingerer has learned to ignore sounds, tones and words directed toward the ear in which he is simulating deafness. He also learns when to elevate the pitch of his voice during the examination. The tests now in use, while attaining a certain degree of success,
Pitman LK. A DEVICE FOR DETECTING SIMULATED UNILATERAL DEAFNESS. JAMA. 1943;121(10):752-753. doi:10.1001/jama.1943.62840100001010