Double Vowels


One of the most intensively used paradigm for studying simultaneous sound segregation is the identification of double vowels. The most important result discussed in Chapter 6 of the book is the finding that the introduction of a difference in the pitch of the two vowels improves their identification.

Here is a demonstration of double vowels. The vowels illustrated here are the japanese vowels used by de Cheveigné and colleagues in a series of studies discussed in the book. The software used to generate these vowels was supplied by Alain de Cheveigné.

Use this checkbox to start and stop playing the sounds.

Use these buttons to select different types of vowels as sound 1 and 2 and to change their pitch difference.

Vowel 1Vowel 2Semitone


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