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What problem is introduced when a hearing instrument is inserted into the concha and/or EAM in regards to resonance? How is it fixed : Eliminates naturally occuring resonances of same-frequency signals, which must be fixed through the instrument for more natural-sounding amplification Frequency range to which the outer is is more sensitive : 2700 Hz to 5000 Hz Professionalism : The practice of an occupation with the highest standards of performance, accountability, and work ethic The "R" in HEAR : Recommendations The "H" in HEAR : History 2 | P a g e Auris Dextra (AD) : right ear Posterior : toward the back Anterior : toward the front Inferior : below Tympanic membrane's common name : The eardrum Tympanic membrane attachment : Attached to temporal bone of skull by annular ligament at annular sulcus of tympanic portion Tympanic membrane function : vibrates in response to sound waves; transduces sound wave into mechanical energy for middle ear 3 | P a g e Why must a hearing instrument specialist be aware of the vascular network underlying the skin of the EAM, and who commonly has problems with it? : A small amount of blood may be seen following a deep ear impression especially with individuals taking blood thinners, who have bleeding disorders, or with diabetes Natural ear canal resonance : Contributes to the perception of sound quality Lateral : away from the midline Auris Sinistra : left ea