Context: In phonetics, aspiration is the strong burst of breath that accompanies either the release or, in the case of preaspiration, the closure of some obstruents. In English, aspirated consonants are allophones in complementary distribution with their unaspirated counterparts, but in some other languages, notably most Indian and East Asian languages, the difference is contrastive.

Question: Aspiration and preaspiration are used in what?
Answer: phonetics

Question: Aspirated consonants are what in English?
Answer: allophones

Question: What are two language types where the difference is contrastive?
Answer: Indian and East Asian

Question: What creates a strong burst of breath?
Answer: Unanswerable

Question: What are aspirated consonants in the Asian language?
Answer: Unanswerable

Question: Allophones are similar in what two languages?
Answer: Unanswerable

Question: What accompanies the opening of some obstruents?
Answer: Unanswerable

Question: What uses a weak burst of breath?
Answer: Unanswerable