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