Glossary H
A Headphone is described as an electromagnetic transducer designed to be worn on the human head for the purpose of audio listening/monitoring, and as distinct from an earphone, or system worn in the ear. Headphones (plural) would be a pair - one for each ear. They are usually based on the principle of electromagnetic induction used to convert the electrical energy output of a headphone amplifier into acoustic energy, or sound.
Height computer is characterized as a calculating device for converting indicated to true height by taking the density factor into consideration.
Hardwoods are referring to trees that lose their leave in winter. It is a description applied to woods from deciduous broad-leafed trees (Angiosperms).
Deutsch: Kopfbedeckung / Español: Protección para la cabeza / Português: Equipamento de proteção para a cabeça / Français: Équipement de protection de la tête / Italiano: Protezione per la testa /
Headgear is defined as a Strap worn around the back of the head which is used to help pull the teeth back or influence the jaw growth.