Self-Assessment

1. A tympanogram plots acoustic admittance against which variable?

2. A flat tracing with a normal equivalent ear-canal volume is most consistent with:

3. A peak at -250 daPa with normal amplitude is classified as:

4. Positive acoustic reflex decay at 500–1000 Hz is most suggestive of:

5. A patient has a conductive loss with a Carhart notch and a type As tympanogram with absent reflexes. The most likely diagnosis is:

6. A type Ad tympanogram with a large air–bone gap most strongly indicates:

7. Which structure couples ear-canal sound pressure to the ossicular chain?

8. At the 226 Hz probe tone, the normal middle ear is best described as:

9. Which muscle contracts to produce the acoustic reflex?

10. The probe assembly of a tympanometer contains a loudspeaker, a pump, and a:

11. Why does the tympanogram peak occur near 0 daPa in a healthy ear?

12. A 1000 Hz probe tone is preferred over 226 Hz in young infants because:

13. What is the most important first step in obtaining a reliable tympanogram?

14. A flat trace with a very SMALL equivalent ear-canal volume most likely indicates:

15. During the pressure sweep, the residual admittance at the extreme pressures represents:

16. A peak at normal pressure with a static admittance of 0.18 mmho is classified as:

17. Which adult equivalent ear-canal volume would be considered within normal limits?

18. A broad, poorly defined peak with an abnormally wide tympanometric width suggests:

19. An afferent (auditory nerve) lesion on the left would abolish the acoustic reflex when:

20. A facial nerve lesion proximal to the stapedial branch produces an absent reflex:

21. Wideband acoustic immittance differs from conventional tympanometry mainly because it:

22. Compared with normal ears, otosclerosis typically shifts the resonance frequency:

23. A pure conductive hearing loss on the audiogram shows:

24. The Carhart notch is best described as: