What are the differences between phoneme /i:/ and phoneme /i/?

Answer 1

. [i:] is a close (high), long, tense, unrounded vowel. The duration of [i:]can be compared to that of the Romanian vowel in plural nouns like genii and the sound is roughly similar to the French vowel of the French word précise, though not so close. The vowel is distributed in all three basic positions: word-initial: east; word-medial: dean and word-final: sea. As already mentioned, it is longer if it occurs in syllable final position and shorter if it is followed by a voiced sound, the shortest variants being those followed by a voiceless obstruent. If followed by a nasal stop it is nasalized: e.g. bean, beam. It is spelt e: economy, remark, or ee: eel, see, feet, or ea each, seal, plea. Other possible spellings are ie: fiend, ei:
seizing, i: machine, or, exceptionally: ey: key; ay: quay [ki:], eo: people, oe: Oedipus or eau: Beauchamp [bi:±cm]
/ı/. This is a more retracted front vowel, and its degree of openness is close to that of the cardinal half-close position. [2] is a short, lax, unrounded vowel, its length varying, as in the case of the preceding
vowel, according to the nature of the following consonant. The length decreases if the following sound is voiceless. It is distributed in all three basic positions: initial, medial and final: ink, kill, aptly. After the schwa, it is the commonest English vowel in unstressed positions. The vowel is spelt i (e.g. ill, tick) or y; syntax, party. Other spellings are possible as well, as in the exceptional examples minute [mınıt] (NB. The adjective having the same spelling is read [maınju:t], private [praıvıt], women [wımın]. As it commonly represents a reduced unstressed vowel, other spellings are also possible – for instance day [deı] is reduced to [dı] in the names of the days of the week: Friday [fraıdı]

Answer 2

Phoneme I

Answer 3

allophone : 1. Linguistics A predictable phonetic variant of a phoneme. For example, the aspirated t of top, the unaspirated t of stop, and the tt (pronounced as a flap) of batter are allophones of the English phoneme 2. or Allophone Canadian A person whose native language is other than French or English. * [p] and [pH] are allophones of the phoneme /p/. * [t] and [tH] are allophones of the phoneme /t/. phoneme: The smallest phonetic unit in a language that is capable of conveying a distinction in meaning, as the m of mat and the b of bat in English.

Answer 4

Can't beat profuy's explanation. What a great answer!!

My only quibble is Oedipus- I pronounce this as ED-i-pus, not EEd-i-pus. Are you British, profuy??

Answer 5

Time and "tension", actually. The /i/ is pronounced with less emphasis than is /i:/. Otherwise, they are very similar sounds.

Answer 6

/i/ is the i in "pick" or the vowel sould pInk or pIck it's a short i
/i:/ is the long i sould like pEAce / pi:s/

or pEAch / pi:ts/ peel /pi:l/