Speech Audiometry. Pure Tone Audiometer Schematic of Speech Audiometer.

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Presentation transcript:

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 selector switch for input on each channel volume control (VC) and volume unit (VU) meter

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

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

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

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

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