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.

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Harvesting is described as the process of threshing or picking a grain crop by a large machine called a combine. It can also refer to picking vegetable and fruit crops by hand.

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Hammer is described as an instrument for driving nails, beating metals, and the like, consisting of a head, usually of steel or iron, fixed crosswise to a handle. The hammer usually has a curved claw used to extract nails.

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Height computer is characterized as a calculating device for converting indicated to true height by taking the density factor into consideration.

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Heading refers to the direction toward which an aircraft,boat or ocean vessel is oriented or is pointing at a given moment. A heading may be with reference to true north or magnetic north. The heading and course may be different, especially in air navigation, because of drift.

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Hardwoods are referring to trees that lose their leave in winter. It is a description applied to woods from deciduous broad-leafed trees (Angiosperms).

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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.

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Hickory is characterized as a strong, open-grained hardwood known for wide variation of color and texture. Works well to express the beauty and character aspects of real wood. A unique, wilder wood with beautiful, active textures that range from light to mid to dark to gray tones.

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