Transcription is a representation in writing of the actual pronunciation of a speech sound, word, or piece of text, using not a conventional orthography but a symbol or set of symbols specially designated as standing for corresponding phonetic values.
The phonetic symbols of the English language are:

Note that you may encounter slightly different symbols because there exist other sets of phonetic symbols.
Vowels
/riːd/, /sɪt/, /bʊk/, /tuː/, /men/, /əˈmerəkə/, /wɜː(r)d/, /sɔː(r)t/, /kæt/, /bʌt/, /pɑː(r)t/, /nɒt/
Note that the (r) sound in the words above is typical of American English. Americans would also say /nʌt/ rather than /nɒt/, while Britons would normally make the /ɒ/ sound in words like not, hot or stop.
Consonants
/pɪɡ/, /bed/, /taɪm/, /duː/, /tʃɜː(r)tʃ/, /dʒʌdʒ/, /ˈkiːləʊ/, /ɡəʊ/, /faɪv/, /ˈveri/, /θɪŋk/,
/ðə/, /sɪks/, /zuː/, /ʃɔː(r)t/, /ˈkæʒuəl/, /mɪlk/, /nəʊ/, /sɪŋ/, /həˈləʊ/, /lɪv/, /riːd/,
/ˈwɪndəʊ/, /jes/
Diphthongs
A diphthong is a vowel sound in which the tongue changes position to produce the sound of two vowels.
/hɪə(r)/, /deɪ/, /tʊə(r)/, /bɔɪ/, /ɡəʊ/, /weə(r)/, /maɪ/, /haʊ/
For more practice, use the video below. Repeat after the speaker.
Exercise. Match each word to its transcription. The answer key is given below.
Word | Transcription |
1. sheep | a. /ʃɪp/ |
2. ship | b. /tʃiːks/ |
3. leak | c. /dʒem/ |
4. lick | d. /ˌfɪfˈtiːn/ |
5. cheeks | e. /ʃiːp/ |
6. chicks | f. /ˈfɔː(r)ti/ |
7. jam | g. /ˈfɪfti/ |
8. gem | h. /liːv/ |
9. Brad | i. /liːk/ |
10. bread | j. /bræd/ |
11. fifty | k. /lɪk/ |
12. fifteen | l. /tʃɪks/ |
13. forty | m. /bred/ |
14. fourteen | n. /ˌfɔː(r)ˈtiːn/ |
15. leave | o. /dʒæm/ |

Answer key:
1 – e, 2 – a, 3- i, 4 – k, 5 – b, 6 – l, 7 – o, 8- c, 9 – j, 10 – m, 11 – g, 12 – d, 13 – f, 14 – n, 15 – h