Exam Preview

The Earlens Difference. Why Contact Drive Succeeds Where Acoustic Devices Fail

---

1.  More insertion gain is needed in high-frequency regions because: The speech spectrum rolls off substantially in the high frequencies Humans are less sensitive to high frequency sounds Resonance characteristics of the middle ear Humans are more sensitive to mid frequency sounds

2.  The potential benefits of low-frequency amplification are often neglected when fitting conventional devices because: Many hearing aid users prefer the sound of their own voice when fit with non-occluding ear tips or molds. Feedback becomes a problem for many users The lows don’t need to be amplified All useful speech information is at higher frequencies

3.  The Earlens contact hearing solution delivers premium hearing healthcare service through: An Audiologist only A partnership between an audiologist and an otolaryngologist An Otologist only A primary care physician

4.  Contact-based direct drive technology works via: Vibrating the oval window directly Placing a transducer to vibrate the eardrum at the pars flaccida region Placing a receiver in the ear canal Placing a removable transducer deep in the ear canal to vibrate the eardrum at the umbo region

5.  Providing audible amplification across a wider bandwidth results in: Decreased incidence of feedback Improvements in sound quality Less occlusion Tinny sound quality

6.  Direct middle ear stimulation to transmit acoustic information is achieved by: Middle ear implants only Acoustic hearing aids Earlens and Middle Ear implants Earlens only

7.  Achieving 60 dB insertion gain in high-frequency regions with conventional hearing aids is a challenge because: Limited high frequency maximum output and occurrence of feedback with higher gains prevent this Venting would cause sound leakage Limitations in signal processing algorithms prevent this Speech rolls off at high frequencies

8.  Benefits of direct drive include: Delivery of audible information over an extended bandwidth without distortion or occlusion Efficient energy transfer for low frequencies only Efficient energy transfer for high frequencies only Normalization of tympanometry test results

9.  When speech is amplified over a wide bandwidth and is audible: There is a higher chance of occurrence of feedback Speech perception may be difficult because information that is not useful is amplified Speech perception is poorer because of increased low frequency information Speech perception is easier because of increased redundancy of information

10.  Benefits of direct drive technology do NOT include: Audible amplification from 100Hz to 10000Hz. Reduced occurrence of feedback Poor sound quality Balanced loudness as low and high frequency sounds are amplified.