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IPAoy
Diphthong
Diphthong OY / Choice Vowel
The diphthong vowel sound heard in words like "boy", "noise", "coin", and "toy". Often called the CHOICE vowel. It starts with a mid-back rounded vowel /ɔ/ (like in 'caught') and glides towards a high front unrounded vowel /ɪ/ (like in 'sit').
Voicing
VoicedPlace of Articulation
Back-to-FrontManner of Articulation
Vowel (Diphthong)Mouth Position
Start with the jaw mid-open, tongue low-mid and back, lips rounded (/ɔ/). Then, glide the tongue high and forward while unrounding the lips and closing the jaw slightly for the /ɪ/ sound.
How to Make This Sound
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Example Words
boyMain Example
bɔɪnoise
nɔɪzcoin
kɔɪntoy
tɔɪvoice
vɔɪschoice
tʃɔɪspoint
pɔɪntjoin
dʒɔɪnoil
ɔɪlenjoy
ɪnˈdʒɔɪPronunciation Practice
11 words
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Quick Practice
3-5 essential words
Full Practice
All 11 words
Minimal Pairs
Listen and compare similar sounds
oy
boil
bɔɪlCompare with
B
bile
baɪloy
toy
tɔɪCompare with
T
tie
taɪoy
coin
kɔɪnCompare with
K
kine
kaɪnTongue Twister
Practice: Diphthong
“Roy enjoys the noisy toys.”
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