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Hearing Loss & Speech Sounds

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An introduction to audiograms, hearing loss and speech sounds.

An introduction to audiograms, hearing loss and speech sounds.

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    Hearing Loss & Speech Sounds Hearing Loss & Speech Sounds Presentation Transcript

    • Hearing Loss & Speech Sounds © Heidi Walsh 2004 rev 2010
    • Pure Tone Audiometry
      • Main method for testing hearing
      • Series of pure tones or notes played through headphones
      • Patient presses a button when (s)he hears a sound
    • Headphones
      • Two types of headphone
        • Air conduction – regular headphones
        • Bone conduction –pad placed on bone behind ear
      • If there is a difference between air and bone it indicates that there is a problem in getting sound through to the inner ear
        • Blocked ear canal
        • Damaged bones in middle ear
      • An audiogram is a way of representing a person’s hearing loss.
      • It records loudness against frequency.
      • An audiogram is produced during the pure tone test described above.
    •  
    • 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
    • This audiogram shows a noise-induced hearing loss with the classic ‘notch’ at 4,000 Hz
    • 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)
    • f s th k g h p ch sh r a i o j m d b z v n ng e l u This audiogram shows the speech sounds – often called the speech banana
    • f s th k g h p ch sh r a i 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
    • f s th k g h p ch sh r a i 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
    • Sound Levels Air raid siren 140dB Jackhammer 130dB Jet engine 120dB Pop concert 110dB Chain saw 100dB Lawnmower 90dB Telephone Ringing 80dB Vacuum cleaner 70dB Dishwasher 60dB Quiet speech 40dB Whisper 20dB Silence 0 dB