Understanding how English sounds are physically produced transforms the way you speak and listen. Postalveolar affricates are among the most distinctive consonant sounds in the language, and mastering them requires knowing exactly what your tongue, lips, and airflow are doing at every moment.
How are postalveolar affricates produced? [01:02]
Before focusing on affricates, it helps to know the divisions of the tongue: the tip, the blade, the front, the back, and the root. Each section plays a different role depending on the sound you produce.
An affricate is a sound that begins as a plosive (or stop) and ends as a fricative [01:18]. In simpler terms, your tongue creates a full closure — like with plosive sounds such as /b/, /p/, /k/, /g/, /t/, and /d/ — and then releases slowly, allowing air to pass through a narrow gap. That controlled release creates friction, which is the defining characteristic of fricatives.
For postalveolar affricates specifically, the tip, blade, and front of the tongue rise to the postalveolar region — the area just behind the alveolar ridge — to form the initial closure [01:48]. The articulators involved include:
- The alveolar ridge.
- The postalveolar region.
- The hard palate.
- The lips.
- The tongue.
What is the difference between the ch and j sounds? [02:16]
English has exactly two postalveolar affricates, and they form a voiceless-voiced pair:
- Voiceless /tʃ/: the ch as in church. In IPA, it combines the /t/ symbol with the /ʃ/ (sh) symbol. Your vocal cords do not vibrate.
- Voiced /dʒ/: the j as in judge. In IPA, it combines /d/ with /ʒ/ (the sound in pleasure). Your vocal cords vibrate during production.
Notice how each affricate mirrors a plosive-fricative pair you already know. The ch sound fuses /t/ + /ʃ/, and the j sound fuses /d/ + /ʒ/ [02:30].
How do these sounds appear in real sentences? [02:55]
A short dialogue in the lesson illustrates both sounds naturally:
- Project — contains /dʒ/.
- Choice — contains /tʃ/.
- Teacher — contains /tʃ/.
- Child — contains /tʃ/.
- Research — contains /tʃ/.
- Question — contains /tʃ/.
- Germany — contains /dʒ/.
- Argentina — contains /dʒ/.
Can you tell ch from j in connected speech? [03:36]
Two practice sentences help sharpen your ear:
- "Our favorite team won the championship." — The word championship starts with the voiceless /tʃ/ and ends with the /ʃ/ (sh) sound [03:44].
- "All schools should invest in new technology." — The word technology ends with the voiced /dʒ/ [04:10].
How can you practice postalveolar affricates on your own? [04:28]
The lesson provides a fill-in-the-blank exercise with ten target words, each containing either /tʃ/ or /dʒ/:
- Words with /tʃ/: cheating, kitchen, match, future.
- Words with /dʒ/: knowledge, Nigeria, subject, Egypt, generations, fridge.
The recommended routine is straightforward: complete the sentences, then record yourself reading them out loud. Hearing your own production lets you compare it against model pronunciation and self-correct.
A helpful first answer is given as a guide: "The only way they could win the match is by..." — with the clear /tʃ/ sound at the end [04:55].
Try recording each sentence, pay close attention to whether your vocal cords vibrate (voiced /dʒ/) or stay silent (voiceless /tʃ/), and share your results for feedback.
