Hearing Aid Dispensers Written Exam Questions with Correct Answers A large perforation of TM can commonly cause how many dB of loss. - Correct Answer 30 dB What type of loss is favorable to medical treatment. - Correct Answer Conductive Carhart Notch appearing at 2 KHz. BC test is poorer than the actual sensorineural response in the low frequencies. Caucasian middle-aged women are most at risk. Worse for pregnant women, who can
experience a rapid decrease in hearing ability: - Correct Answer Otosclerosis
___ is good to find hearing loss. ___ & SRT are within 5 to 10 dB difference. - Correct Answer PTA Component in input & output compression. - Correct Answer Feedback circuit.This vent in a non-occluding earmold enhances high frequencies. - Correct Answer Parallel vent.What is the most common earmold material that has durability & easy modification? - Correct Answer Silicone 2,000 What is the major function of the earmold? - Correct Answer Acoustic enhancement in the ear canal.Provides comparison between unaided & aided output. - Correct Answer Functional gain.What frequency is emphasized naturally do to the large & or open vent in the SIE or RIC hearing aids?
- Correct Answer High frequency.
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What tympanogram shows significant negative pressure & normal mobility? - Correct Answer Type C.What tympanogram shows restricted TM mobility? (Otitis media) - Correct Answer Type B.What tympanogram shows normal middle ear pressure but reduced mobility?(Fixation of the ossicular chain) - Correct Answer Type As.