Hearing Technology Defini ons: Where do we draw the lines? Meredith A. Holcomb, AuD, CCC-A Medical University of South Carolina Clinical Director, Cochlear Implant Program Clinical Assistant Professor, Dept of OTO-HNS Agenda • Hearing review • Func on of a hearing aid • Func on of a cochlear implant • Difference/Similari es • Changes over me • Melding the two devices • Future for technology How do we hear?
Types of Hearing Loss
• Conduc ve Hearing Loss • Sensorineural Hearing Loss • Mixed Hearing Loss Conduc ve Hearing Loss
• Examples: • Fluid in the middle ear from colds and/or allergies • Ear infec on (o s media) • Poor eustachian tube func on • Perforated eardrum • Benign tumors • Impacted earwax (cerumen) • Swimmer's Ear (o s externa) • Foreign body • Absence or malforma on of the outer ear, ear canal, or middle ear • Treatment: • Surgery • Hearing aids • Osseointegrated Device Sensorineural Hearing Loss
• Examples of SNHL: • Illnesses, Syndromes • Ototoxic drugs • Gene c or hereditary hearing loss • Aging • Head trauma • Malforma on of the inner ear • Exposure to loud noise • Treatment: • Hearing aids • Cochlear Implant Mixed Hearing Loss • Conduc ve hearing loss occurs in combina on with a sensorineural hearing loss. • Possible damage in the outer or middle ear and in the inner ear(cochlea) or auditory nerve. • Examples: • Permanent hearing loss and ear infec on • Permanent hearing loss with impacted cerumen • Treatment: • Surgery • Hearing aids • Osseointegrated Device • Cochlear implant Func on of a Hearing Aid
• Three parts: 1. Microphone Picks up sound Sounds are analyzed / processed and sent to the amplifier 2. Amplifier Increases volume of sounds and send to loudspeaker 3. Speaker Sends sounds into the ear Photo courtesy of Starkey.com What is a Cochlear Implant?
Cochlear implants are designed to bypass damaged parts of the ear to stimulate the auditory nerve directly through the application of external electrical current
Image courtesy of MED-EL How a Cochlear Implant Works 1) The speech processor microphone picks up sound from the environment. 2) The processor turns sound into electricity.
Image courtesy of MED-EL How a Cochlear Implant Works
3) This electricity is transmitted across the skin, and the internal implant generates electrical pulses at the electrodes.
Image courtesy of MED-EL
How a Cochlear Implant Works
4) Each electrode fires thousands of times each second to represent sounds in the environment.
Image courtesy of MED-EL
High Mid Low Hearing Aid vs Cochlear Implant
• Amplifies sound and delivers it acous cally • Amplifies sound and delivers it electrically • No surgery • Surgery • Covered by few health insurance policies • Covered by most insurance policies • Smaller in size • Larger in size • 10-14 days with disposable ba eries • 3-4 days with disposable ba eries • For pa ents who struggle with speech • For pa ents who struggle with speech understanding without amplifica on understanding with appropriately fit HAs • Does not fix hearing loss • Does not fix hearing loss • Improves quality of life • Improves quality of life Advanced Bionics Corpora on NEW PROCESSORS OLD PROCESSORS Naida Q70 Naida Q90
Neptune
Courtesy of AB Cochlear Americas New Processors Old Processors
Courtesy of Cochlear Med EL Corpora on NEW PROCESSORS EAS OLD PROCESSORS Sonnet
Opus 2 Tempo Tempo
Rondo
Courtesy of MedEl Internal CI Devices Bimodal vs Bilateral Bilateral CI Bimodal HA+CI
• All bilateral users(CI + CI) and bimodal users (CI + HA) perform be er than unilateral CI users • Firszt et al 2008; van Schoonhoven et al 2013;Dunn et al 2010 • Bimodal users with be er HA aided PTA (< 55) are more likely to benefit from amplifica on • Yoon et al 2012 Technology Similari es / Differences
Hearing Aid vs Cochlear Implant
• Accessories are addi onal purchase • Accessories included with surgery • Direc onal mics • Direc onal mics • Noise suppression • Noise suppression • Wind reduc on • Wind reduc on • Front end signal processing • Front end signal processing • Telecoil • Telcoil • Phone signal to both ears for most companies • Phone signal to both ears for landline (one company) • Cannot s mulate all frequency range par cularly when there are “dead regions” • Able to s mulate all frequency range CI and HA in ONE device
Hybrid (Cochlear) EAS (MED-EL)
Tradi onal CI EAS / Hybrid for Adults
Audiometric requirements have changed greatly for adults When to consider referral for CI eval: Factors Affecting Success with CIs and HAs • Degree of HL • Participation in aural rehab program • Family support • Resources • Accessibility to services • Noise • Medical history (syndrome, cognition, other developmental delays) • Inner ear anatomy • Wear time Future Direc ons for CI
• Unilateral hearing loss • Expanded candidacy criteria • Improved programming methods • Be er technology • Completely Internal • Waterproof on ear device • Ba ery life • Lower manufacturing costs • Be er connec vity Conclusions: A Cochlear Implant Is ONLY A DEVICE! Hearing DOES NOT Equal Speech Understanding!