1 / 22

Hearing loss and audiograms

Hearing loss and audiograms. Objectives. To understand how hearing loss is measured To recognise the degree and type of deafness from an audiogram To relate a person’s audiogram to how they might understand speech Relevant for: Assignment 1 b Audiology and aural rehabilitation.

audrey-noel
Download Presentation

Hearing loss and audiograms

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hearing loss and audiograms

  2. Objectives • To understand how hearing loss is measured • To recognise the degree and type of deafness from an audiogram • To relate a person’s audiogram to how they might understand speech • Relevant for: Assignment 1 b Audiology and aural rehabilitation

  3. Referral pathways in NHS • Over 55 • G.P examines outer ear with otoscope • If nothing abnormal detected (NAD), G.P refers direct to audiology department for hearing test (if only age-related) or to ‘Any Qualified Provider’ (AQP) • Hearing aids if appropriate • Under 55 - or over 55 and needs further examination • G.P examines outer ear with otoscope and refers to hospital ENT (ear, nose and throat) Consultant • ENT Consultant examines outer ear, takes a history, sends patient to audiology • Audiology department does hearing test and further diagnostic tests if required. • Hearing aids if appropriate

  4. What is Any Qualified Provider - AQP? • • Patients can choose from a range of providers to get NHS hearing aids e.g. local hospital or Specsavers, Boots etc. • • Prices paid to providers are determined by the NHS.. • • Patients choose based on individual preferences and money will follow patients’ choices. • • Providers must pass a standard qualification process to ensure they meet the appropriate quality standards • However, about 20%* of the patients meeting AQP criteria will have complex needs and so require referral back • *Source: Reading Health Forum

  5. Pure tone audiometry (PTA) • Uses ‘pure tones’ = tones of a single frequency • Measures the ‘hearing threshold‘ = the quietist sounds the person can hear • Results are used to help diagnose the type and degree of hearing loss • Results can be used to prescribe hearing aid(s)

  6. Ways of classifying the degree of hearing loss • Hearing loss is classified as: • Normal • Mild hearing loss • Moderate hearing loss • Severe hearing loss • Profound hearing loss

  7. Degrees of hearing loss

  8. Document Title

  9. The ‘speech banana’

  10. The higher the line = the better the hearing mild moderate normal severe profound

  11. Remember how we hear?

  12. Pure tone audiometry (PTA) Measuring the ‘hearing threshold‘ using pure tones at different frequencies - air conduction - bone conduction

  13. PTA air conduction test • Pure tones presented through headphones • Measures the hearing from the outer ear, through the middle ear to the cochlea i.e. tests the whole hearing mechanism

  14. PTA bone conduction test • Pure tones presented through a receiver placed behind the ear on the mastoid process (bone) • Bypasses the outer ear and the middle ear; sound goes to the cochlea through the skull

  15. Why consonants matter… A _ _ _ _ u _ e _ _ _ _ i _ e _ _ o _ o _ a _ e _ i _ _ u i _ _ (vowels only)

  16. Why consonants matter… _ llst_ d_ ntsl_k_ ch_c_l_t_ b_sc__ts (consonants only)

  17. The ‘speech banana’

  18. Presbyacusis ( Age-related hearing loss)

  19. Noise-induced hearing loss

  20. The cochlea • Different frequencies detected in different parts • High frequencies detected nearest to the end where the stapes joins • Excessive noise damages this part

  21. Descriptors of hearing loss • Sensori-neural • Conductive • Mixed • Congenital • Acquired • Progressive • Fluctuating • Bilateral • Unilateral • Symmetrical • Asymmetrical • High frequency • Low frequency

More Related