Sure! Let's focus on the sounds /ɪ/ and /iː/ in the words you provided. Here are the words, separating them to highlight the sounds:

- **noisy** (/nɔɪ.zi/) - has the /iː/ sound
- **exciting** (/ɪkˈsaɪ.tɪŋ/) - has the /ɪ/ sound
- **expensive** (/ɪkˈspɛns.ɪv/) - has the /ɪ/ sound
- **cheap** (/tʃiːp/) - has the /iː/ sound

- **clean** (/kliːn/) - has the /iː/ sound
- **peaceful** (/ˈpiːs.fəl/) - has the /iː/ sound
- **convenient** (/kənˈviː.njənt/) - has the /iː/ sound
- **friendly** (/ˈfrɛn.dli/) - has the /ɪ/ sound

Repeat these words, paying attention to how the /ɪ/ sound is more short and relaxed, while the /iː/ sound is longer and tenser. Would you like to practice with more examples?