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Fundamental Concepts for Wideband Acoustic Immittance Measurements, in partnership with Seminars in Hearing

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1.  Acoustic impedance of the middle ear can be measured using which of the following measures? 226-Hz & 1000-Hz tympanometry 3000-Hz tympanometry only 4000-Hz tympanometry only None of the above

2.  Under which one of the following conditions will acoustic resonance NOT occur in a vibrating system? When the impedance is not at its minimum When a guitar string is out of tune When the resistance to motion is low When the mass and stiffness reactance cancel each other

3.  Which of the following statements regarding wideband acoustic immittance (WAI) are true? In WAI, the probe stimulus is a transient stimulus with acoustic components covering a wide range of frequencies. WAI can measure impedance (or admittance) of the middle ear across a wide range of frequencies. In WAI, normal absorbance variations are common due to differences in anatomy of the outer and middle ear of normal-hearing individuals. All of the above

4.  Which of the following conditions will wideband tympanometry NOT identify? A floppy eardrum Otitis media with effusion Inner ear disorder Outer ear disorder

5.  Which of the following statements regarding the interpretation of absorbance findings is INCORRECT? Abnormal increase in absorbance in the low frequencies indicates the possibility of a hypermobile eardrum. Abnormal decrease in absorbance in the low frequencies indicates low stiffness of the middle ear. Abnormal decrease in absorbance in the low frequencies indicates very high stiffness of the middle ear. Abnormal decrease in absorbance in the high frequencies (> 3 kHz) can indicate increased mass elements in the middle ear.