00:00Hi, this is the oi sound, as in the words point, boy, and voice.
00:15Oi is a diphthong sound, which means it's a combination of two vowel sounds that are produced within the same syllable.
00:23The oi sound is a combination of the oar and the i or ee sounds.
00:34Like vowels, the diphthongs are made through the mouth and are voiced, which means that you vibrate your vocal cords to make the sound.
00:42But unlike vowels or consonants, when you pronounce a diphthong sound, your mouth will change position and shape as you say the sound,
00:52because they are a combination of two vowel sounds.
00:56So, as you say the oi vowel sound, your mouth will start on the position of oar and finish on the position of i or ee.
01:05So, the main difference here is that we're going from the rounded oar to the unrounded ee.
01:16Oi, oi, oi.
01:24One of the most difficult things about learning English is the spelling.
01:28This is because spelling is often not phonetic, especially with the vowels and diphthongs.
01:33So, you'll find the oi sounds spelled in many different ways.
01:39But the most common ways are with the letters oi or oy.
01:47As in the words join, oil, choice and enjoy.
01:58The oi sound is not very common, but there are a couple more examples that you should know about.
02:11They are avoid and employee.
02:17So, that's it for the oi sound.
02:28We've also made videos on each of the phonetic sounds, which you can see by clicking on these links.
02:35We've also made videos on the groups of sounds, vowels, diphthongs, consonant pairs, and single consonants.
02:43As well as a video explaining the overall phonetic chart.
02:47We regularly post new videos, so if you like this video and want to improve your English please click here to subscribe to our channel.
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