This CD contains the „Perception Discrimination Test“ (by Warnke^®) where difficult consonants in a combination of vowels must be recognized.
Beside this test, which has proved successful for many years, you will find a lot more on this CD: There is an articulate lecture on the Warnke-Method accompanied by several audible examples:

- The development of hearing from fetus to a small child
- Information about the term „Order Threshold“ (including a short test)
- Introduction of different training-methods

There are two additional tracks (12 minutes each) that consist a) of a murmuring of voices in the background and b) typical classroom noises.

Please note: this CD is not available in English yet.