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Silent Hearing Aid: Common Hearing Aid Concepts Through a New Lens

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1.  MPO in Earlens devices stands for: Maximum pressure output Mean pressure output Maximum possible output Mean possible output

2.  Feedback occurs in Earlens devices (complete the sentence with one of the following options): When you hold the processor in your hand. When the system is driven hard enough that vibration of the eardrum is picked up by microphones When hearing loss exceeds 50 dB HL in the high frequencies. When sounds amplified in the high frequencies are reflected back from the eardrum.

3.  Choose the statement that accurately reflects venting in Earlens. Venting does not cause loss of low frequency amplification in Earlens Closing the vent can increase perception of low frequencies in Earlens. Venting configuration needs to be selected based on gain requirements. Larger vents can compromise sound quality in Earlens.

4.  Which statement correctly describes verification in Earlens devices? Real ear measurements are used for verifying that Earlens output matches targets. Calibration is a replacement for traditional audiogram measurement. Calibration accounts for variability in middle ear efficiency and device performance and therefore confirms that targets are achieved and audible to the patient. Calibration and real ear measurement can be done to verify output.

5.  A pressure vent is not recommended for Earlens fittings because: Earlens requires larger vent size for energy transfer. Feedback with Earlens devices is rare and can be easily managed through the feedback canceller. Pressure vents are not successful in reducing feedback. Feedback in Earlens systems depends on vent size.