For Speech Perception Testing in the laboraotry and clinics, Please use i-CAST and i-STAR Program.


For Auditory Training and Rehabilitation, please use Angel Sound Program.




Computer-Assisted Speech Training (CAST):


The Computer-Assisted Speech Training (CAST) software system was developed to help accelerate cochlear implant patients' auditory rehabilitation process. The cochlear implant is an electronic device that has allowed many profoundly deaf patients to hear sound. However, listening by means of electric stimulation is a totally new experience for implant patients, especially for congenitally deaf implant users. For some patients, an extensive learning period may be required for successful use of the implant. This learning period may involve intensive aural rehabilitation with a speech pathologist. However, there are few speech training tools available for cochlear implant patients to use at home. Here we introduce CAST - a computer-based speech training software that provides comprehensive speech training tools for cochlear implant patients to use at home or in conjunction with auditory rehabilitation from clinical speech pathologist.


Auditory rehabilitation process is a personal journey to improve patient’s speech recognition capabilities. Each patient may start at very different speech recognition capability and also learn at different pace. C.A.S.T system is a dynamic program that continues to adapt to match each individual's unique training styles and learning abilities. So auditory rehabilitation process is always stimulating and never frustrating. This is the optimal way to improve the speech recognition skills and build confidence. Here are the main features of the program.


  • Comprehensive: C.A.S.T provides a wide range of closed-set discrimination, identification tasks, and auditory resolution training with any audio/visual materials: pure tones; band-limited noise; environment sounds; speech signals (phonemes, words, and sentences); video or pictures. The program also provides real-time band-limited speech (telephone speech) and noise mixer allows the program to mimic the realistic listening situations.
  • Adaptable: C.A.S.T provides level of difficulty controls: the number of response alternatives and the proximity of response alternatives. The difficulty of any training tasks can be automatically adjusted based on the previous performance and the difficulty can be controlled by several parameters, including difficulty levels, noise levels, and the advance/retreat threshold.
  • Suitable: C.A.S.T provides user-friendly interface and is easy to use. HTML-based online help file also provides detailed instructions about the difficulties and functions of each individual training task. Automatic generation of training protocols based on standard evaluation outcomes allows an easy approach to design individual-based training tasks. Also the program provides multiple training protocols to be suitable for all patients.
  • Tracking: C.A.S.T records lots of information, including subject (e.g. names, age, device, etc); testing and training performance; testing and training date; as well as the amount of training time records. The program also provides detailed information about performance change over time and its relationship with different processing strategy and MAPs. Moreover, the program provides self-adjustable summary report for the testing and training data as well as multiple views of data with either table or graphic format.