Chapter 25:
The Voiceless Consonants /ĉ f x (h)/

1. Voiceless palatal [ĉ].
2. Palatal affricate [ĉ] pronounced as a fricative [š] by a Puerto Rican.
3. Palatal affricate [ĉ] pronounced as a fricative [š] by a Costa Rican.
4. Palatal affricate [ĉ] pronounced as a fricative [š] by a Panamanian.
5. Labio-dental fricative [f].
6. Labio-dental fricative [f] to bilabial fricative [p̶].
7. Labio-dental fricative [f] to velar [x].
8. A Madrid speaker's strong voiceless velar fricative [χ].
9. A speaker from San Sebastián, Spain, using this strong [χ].
10. Speakers of American Spanish with a velar [x].
11. /x/ to voiceless palatal fricative [ç] before front vowels /i/ and /e/.
12. Speakers of American Spanish who use a glottal [h] rather than the velar [x].