KAF
כ
VOICELESS ASPIRATED VELAR STOP [kʰ]
VOICELESS UVULAR FRICATIVE [χ]
OR
Kaf with dagesh is pronounced like English "k". Kaf with rafe, which typically occurs after vowels, is pronounced with the back of the tongue low in the throat as in the "ch" in the name of the composer "Bach". For those familiar with Arabic, it is pronounced like the letter khā (خ). For kaf with rafe, it is important to allow air to pass through to make a fricative sound.
[kʰ]
כּ
כֿ
[χ]
Hidayat al-Qari
From the second of the places of articulation are heard גֿ and ךֿ rafe. This is the third of the tongue that is adjacent to the pharynx, opposite the (soft) palate. In fact this is not a primary place of articulation, but it functions like one. This is because when gimel and kaf have dagesh, their place of articulation is the middle of the tongue, in its wide part. The primary places of articulation are five in number. The third of the tongue that is the place of articulation of the two (aforementioned) letters with rafe, I mean גֿ and ךֿ, is secondary. So, the total number of places of articulation are six, five primary and one secondary. The middle of the tongue is the place of articulation of five letters, namely גיכרק.
Translation from Khan (TPTBH II.L.1.3.6)
ואלמחל אלתאני מן מחאל אלחרוף יסמע מנה ג̇ ך̇ אלמרפיין והו תלת אללסאן ממא ילי אלחלקום קדאם אלחנך והדא אלמחל ליס הו אלאצל פי אלחקיקה בל יגרי מגראה לאן מתי צאר אלגמאל ואלכאף מדגושה כאן מחלהמא וסט אללסאן בערצ̇ה פאצול אלמחאל כמסה ותלת אללסאן אלדי הו מחל אלחרפין אלמרפיין אעני ג̇ ך̇ הוא פר[ע] פגמלה אלמחאל סתה כמסה אצול וואח[ד] פרע פוסט אללסאן מחל לכמסה חרוף והי ג̇י̇כ̇ר̇ק̇
Text from Khan (TPTBH II.L.1.3.6)
EXAMPLE WORDS:
יֵלְכ֖וּ
[jeːelˈχuː]
בֵּרַ֥ךְ
[beːˈʀ̟aːaχ]
הַמַּלְכָּ֣ה
[hammalˈkʰɔː]
כֶּ֛בֶשׂ
[ˈkʰɛːvɛs]
SOURCES AND FURTHER READING
Khan, Geoffrey. 2020. The Tiberian Pronunciation Tradition of Biblical Hebrew. Cambridge: Cambridge and Open Book Publishers. §I.1.11.