"Ĥ", or "ĥ", is a consonant and letter in the Esperantoalphabet. Since each letter in Esperanto has a consistent sound, this letter is always pronounced the same; its sound is represented by [x] in SAMPA.
... vowels, which is used in various cases, but particularly when recording a shout, or a greeting.)
Vowels (with approximate English equivalents)
a - gut
aa - ...