

Vowel Perception

Dear all,

I would appreciate your help on the following question.

Q. In many of the vowel perception experiments, researchers have studied vowel perception in /hVd/ context. Why the vowel perception is studied in this 
(/hVd/) context? While studying vowel perception what other contexts can be used? And what are the difficulties that may be faced in other contexts (if any)?

Thank you so much in advance,

- Mohan