A Software Tool for Diagnosis of Central Auditory Disorders (Also known as Central Auditory Tests, CAT)


Some adults with normal audiometric findings have reported persistent hearing complaints arising due to auditory system compromise. Cortical, sub-cortical and brainstem disturbances are often found in dyslexic students. Once an audio tape has been prepared, administering the tests appears to be a routine task. However, this is not so. How can one administer a test in English language with American accent to an Indian villager?  Hence it becomes necessary to develop the test material to suit the local language and accent requirements. Also, for research purposes, the test material may have to be changed. This requires a dedicated software tool.

AudioLab software allows an audiologist to:

  •  Record the speech signal and graphically edit it to prepare the test words
  • ‘Normalize’ the signal for calibrated presentation of stimuli
  • Prepare the tests in any desired language and accent
  • Align or control the relative lead of the left/right ear stimuli
  • Display the stimuli for visualization and facility to play individual ear stimulus or the combined stimulus
  • Present the stimuli with controlled inter-stimulus interval
  • Present stimuli mono-aurally or binaurally with lead in one of the ears
  • Randomize the stimuli automatically
  • Save the entire sequence in a master file for later playing

The software package can be installed on any IBM Pentium PC or equivalent running on Microsoft Windows 95/98/2k/XP/7.1.

Central Auditory Tests (CAT):

 Dichotic Test

 Staggered Spondee Test

 Binaural Fusion

 Lowpass Filtered Speech

Compressed Speech

Add Speech signals

Peripheral Auditory Tests (PAT) :

Duration Pattern Test (DPT)

Frequency Pattern Test (FPT) 

Audio Interface Unit (AIU) Accessory

Multi-media Headphones and Microphone are also available as additional accessories.