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Published byCandace Chandler Modified over 9 years ago
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Speech Audiometry
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Pure Tone Audiometer
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Schematic of Speech Audiometer
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Speech Audiometer
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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
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Clinical or Diagnostic Audiometer (Continued) amplifier attenuator output selector AC phones BC vibrator 2 loudspeakers talk back system patient signal device
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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
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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
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Testing (continued) Most Comfortable Loudness (MCL) Connected discourse UCL, TD or LDL Range of Comfortable Loudness (RCL) vs. Dynamic Range
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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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