The tests are either the forced whisper test or audiometry. For the whispered voice test, the driver should be 5 feet from the examiner with the ear being tested turned toward the examiner. The other ear is covered. Using the breath which remains after a forced expiration, the examiner whispers words or random numbers such as 66,18.23. The examiner should not use only sibilants (s-sounding test materials). If the individual fails the whisper test, the audiometric test should be administered.