International Hearing Society Study Guide 2024

International Hearing Society Study Guide 2024 What problem is introduced when a hearing instrument is inserted into the concha and/or EAM in regards to resonance? How is it fixed> - ANS-Eliminates naturally occuring resonances of samefrequency signals, which must be fixed through the instrument for more natural-sounding amplification Frequency range to which the outer is is more sensitive - ANS-2700 Hz to 5000 Hz Professionalism - ANS-The practice of an occupation with the highest standards of performance, accountability, and work ethic The "R" in HEAR - ANS-Recommendations The "H" in HEAR - ANS-History Auris Dextra (AD) - ANS-right ear Posterior - ANS-toward the back Anterior - ANS-toward the front Inferior - ANS-below Tympanic membrane's common name - ANS-The eardrum Tympanic membrane attachment - ANS-Attached to temporal bone of skull by annular ligament at annular sulcus of tympanic portion Tympanic membrane function - ANS-vibrates in response to sound waves; transduces sound wave into mechanical energy for middle ear 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? - ANS-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 - ANS-Contributes to the perception of sound quality Lateral - ANS-away from the midline Auris Sinistra - ANS-left ear Proximal - ANS-Located close to a reference point; "near" Medial - ANS-toward the midline Ear Canal - ANS-the canal that conducts sound vibrations from the pinna to the tympanic membrane and prevents damage to the tympanic membrane; s-shaped tube that ends at the TM Distal - ANS-away from the reference point; "distant" Superior - ANS-Higher on the body, nearer to the head Aures Unitas - ANS-both ears Pinna - ANS-the visible part of the ear; skin-covered flexible cartilaginous structure; orientation and shape allow it to collect and localize sound Three primary functions of the outer ear - ANS-1. Protects structures of the middle and inner ears from foreign bodies 2. Localizes sounds (aids) 3. Boosts higher frequency sounds Two functions of the human ear - ANS-hearing and balance Hearing Loss - ANS-The result of a dysfunction or disorder of the auditory system somewhere along the pathway from the external ear to the auditory centers of the brain Location of the peripheral auditory system - ANS-Within the temporal bone of the skull 5 segments of the temporal bone - ANS-1. Squamous: largest segment; forms both sides of skull 2. Mastoid: bony prominence posterior to pinna 3. Tympanic: forms bony part of the external auditory meatus and provides point of attachment for tympanic membrane 4. Petrous: houses inner ear; shaped like a long pyramid wedged between front and back of cranium; Latin: "Stone-like"; one of the densest bones in body 5. Styloid process: slender projection of bone located inferior to ear; POA for several tongue/larynx muscles external auditory meatus - ANS-Directs sound to tympanic membrane; About 2.5cm (1 in) long and about 5-7mm (1/4 in) wide; oval-shaped; two bends; lateral 1/3 is skin-covered cartilage with hair follicles, sebaceous glands and ceruminous glands; medial 2/3 is skin-covered bone...