The letter h represents the only glottal consonant, the voiceless glottal fricative.
The glottal sound is:
h: hat, hate, hot.
To pronounce the glottal consonant the glottis (the opening at the upper part of the larynx, between the vocal cords) is used as primary articulation.
- h: voiceless, vocal cords do not vibrate during the articulation of the consonant.