Hearing Loss & Speech Sounds

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An introduction to audiograms, hearing loss and speech sounds.

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Hearing Loss & Speech Sounds

  1. 1. Hearing Loss & SpeechHearing Loss & Speech SoundsSounds © Heidi Walsh 2004 rev 2010© Heidi Walsh 2004 rev 2010
  2. 2. Pure Tone AudiometryPure Tone Audiometry  Main method for testing hearingMain method for testing hearing  Series of pure tones or notes playedSeries of pure tones or notes played through headphonesthrough headphones  Patient presses a button when (s)he hearsPatient presses a button when (s)he hears a sounda sound
  3. 3. HeadphonesHeadphones  Two types of headphoneTwo types of headphone  Air conduction – regular headphonesAir conduction – regular headphones  Bone conduction –pad placed on bone behindBone conduction –pad placed on bone behind earear  If there is a difference between air and boneIf there is a difference between air and bone it indicates that there is a problem in gettingit indicates that there is a problem in getting sound through to the inner earsound through to the inner ear  Blocked ear canalBlocked ear canal  Damaged bones in middle earDamaged bones in middle ear
  4. 4.  An audiogram is a way of representing aAn audiogram is a way of representing a person’s hearing loss.person’s hearing loss.  It records loudness against frequency.It records loudness against frequency.  An audiogram is produced during the pureAn audiogram is produced during the pure tone test described above.tone test described above.
  5. 5. This audiogram shows a typical hearing loss associated with ‘old age’ or ‘wear and tear’ – this results in a hearing loss in the higher frequencies
  6. 6. This audiogram shows a noise- induced hearing loss with the classic ‘notch’ at 4,000 Hz
  7. 7. The added complication of a noise-induced hearing loss is that as you become older you can develop age-related deafness as well – which results in a more significant hearing loss in the higher frequencies as hearing falls away (dotted blue line)
  8. 8. f s th kgh p chshr ai o j m d b z v n ng e l u This audiogram shows the speech sounds – often called the speech banana
  9. 9. f s th kgh p chshr ai o j m d b z v n ng e l u The person with this hearing loss (blue line) would not be able to hear the speech sounds ABOVE the blue line without using a hearing aid to make them louder
  10. 10. f s th kgh p chshr ai o j m d b z v n ng e l u The person with this hearing loss (blue line) would not be able to hear the speech sounds ABOVE the blue line without using a hearing aid to make them louder

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