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Phrase screening is the ability of the system to determine whether or not a candidate key word is a close enough match to be declared a valid key word. For example, if the prompt states, "Please respond with `yes' or `no'," and the caller speaks the word "what," the system informs the caller that the response is invalid. The application can be designed to then replay the prompt, "Please respond with `yes' or `no'."
However, to maintain good recognition accuracy it is advisable to structure the application to prompt the caller for the required information only. Although the system can screen phrases, recognition accuracy is best when the application is written to encourage the caller to speak only what is required.
