VOICELESS PHARYNGEAL FRICATIVE [ħ]
Tiberian Hebrew ḥeth does not have a corresponding sound in English. It is a bit like English "h", but not quite as deep in the throat. For those familiar with Arabic, it is pronounced like the letter ḥāˀ (ح).
SOURCES AND FURTHER READING
Khan, Geoffrey. 2020. The Tiberian Pronunciation Tradition of Biblical Hebrew. Cambridge: Cambridge and Open Book Publishers. §I.1.8.