Glossary H
The term handheld refers to any object that is designed to be light and small enough to be held and/or operated with one or both hands.
Harpsichord (in Italian cembalo; and in French clavecin) is defined as a stringed keyboard instrument in which the strings are plucked to produce sound.
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.