"Ĥ", or "ĥ", is a consonant and letter in the Esperanto alphabet. Since each letter in Esperanto has a consistent sound, this letter is always pronounced the same; its sound is represented by [x] in SAMPA.
See also: Esperanto orthography, Ĉ, Ĝ, Ĵ, Ŝ, Ŭ