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Speech Audiometry

Speech Audiometry. Pure Tone Audiometer. Schematic of Speech Audiometer. Speech Audiometer. Clinical or Diagnostic Audiometer. two channels test booth input: pure tone or microphone or CD or phonograph or tape player or computer masking system talk-back system

Thomas
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Speech Audiometry

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Presentation Transcript

  1. Speech Audiometry

  2. Pure Tone Audiometer

  3. Schematic of Speech Audiometer

  4. Speech Audiometer

  5. Clinical or Diagnostic Audiometer • two channels • test booth • input: pure tone or microphone or CD or phonograph or tape • player or computer • masking system • talk-back system • selector switch for input on each channel • volume control (VC) and volume unit (VU) meter

  6. Clinical or Diagnostic Audiometer(Continued) • amplifier • attenuator • output selector • AC phones • BC vibrator • 2 loudspeakers • talk back system • patient signal device

  7. Testing • Monitored live voice (MLV) • Pre-recorded voice • Attenuation: 1—2 dB steps (usually use 5 dB steps) 0—110 dB range • SDT and SAT

  8. Speech Recognition Threshold (SRT) • CID W-1 (constant level) • CID W-2 (attenuated) • Spondiac words (spondees) • Carrier phrase • Watch cross hearing—masking • PTA is about = to SRT

  9. Testing (continued) • Most Comfortable Loudness (MCL) • Connected discourse • UCL, TD or LDL • Range of Comfortable Loudness (RCL) vs. Dynamic Range

  10. Speech Discrimination Score (SDS) vs. Word Recognition Score (WRS) • Recorded in percentage, not dB • Phonetically Balanced (PB) words (50 monosyllabic) • PB 50 or CID Auditory test W-22 • PB Max = patients best discrimination score (25-40 dB SL) • Word Intelligibility by Picture Identification test (WIPI) • 90—100% = normal • 76—90% = slight difficulty (i.e. telephone) • 60—76% = moderate problem • 50—60% = poor recognition—difficulty interpreting speech • < 50% = very poor recognition. Unable to understand speech

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