Glossary: H

The Haeco-CSG or Holzer Audio Engineering-Compatible Stereo Generator system was an electronic analog audio signal processing device…

The Hafler circuit is a passive electronics circuit with the aim of getting derived surround sound or ambiophony from regular stereo…

Haikubox is an artificial intelligence (AI)-enabled device which automatically and continuously identifies backyard birds using their…

Hair cells are the sensory receptors of both the auditory system and the vestibular system in the ears of all vertebrates, and in the…

Half-speed mastering is a technique occasionally used when cutting the acetate lacquers from which phonograph records are produced.

"Hallelujah" is a song written by Canadian singer Leonard Cohen, originally released on his album Various Positions (1984). Achieving…

Hand-stopping is a technique by which a natural horn or a natural trumpet can be made to produce notes outside of its normal harmonic…

"Happy Trails" is a country song performed by Roy Rogers and his wife Dale Evans and written by Evans. It is known as the theme song for…

A harmonic is a sinusoidal wave whose frequency is a positive integer multiple of the fundamental frequency in a periodic signal. The…

Harmonic mixing or key mixing (also referred to as mixing in key) is a DJ technique of matching the musical key of tracks in a DJ mix to…

In classical mechanics, a harmonic oscillator is a system that, when displaced from its equilibrium position, experiences a restoring…

The harmonic series (also overtone series) is the sequence of harmonics, musical tones, or pure tones whose frequency is an integer…

The harmonic seventh interval (also known as the septimal minor seventh, or subminor seventh) is one with an exact 7:4 ratio (about 969…

A harmonic spectrum is a spectrum containing only frequency components whose frequencies are whole number multiples of the fundamental…

Harmonically Enhanced Digital Audio (HEDA) is a class of digital recordings created by using modern digital harmonic enhancement technology.

In music, harmonization (or harmonisation) is the chordal accompaniment to a line or melody: "Using chords and melodies together, making…

In music, harmony is the concept of combining different sounds in order to create new, distinct musical ideas. Theories of harmony seek to…

Harpocrates (Ancient Greek: Ἁρποκράτης, Phoenician: 𐤇𐤓𐤐𐤊𐤓𐤈, romanized: ḥrpkrṭ, Coptic: ϩⲁⲣⲡⲟⲕⲣⲁⲧⲏⲥ harpokratēs) is the god of silence…

Harvard biphase is a magnetic run length code for encoding magnetic tape. It is one of the formats employed in forming the digital bits…

Hauyani is a guitar tuning and method used in southern Africa, derived from the term "Hawaiian" (see Hawaiian guitar).. It refers to both…

Hazel Reeves, MRSS is a British sculptor based in Sussex, England, who specialises in figure and portrait commissions in bronze. Her work…

HD DVD (short for High Density Digital Versatile Disc) is an obsolete high-density optical disc format for storing data and playback of…

HDR10 Media Profile, more commonly known as HDR10, is an open high-dynamic-range video (HDR) standard announced on 27 August 2015 by the…

HDR10+ is a high dynamic range (HDR) video technology introduced by Samsung Electronics Co., Ltd, 20th Century Fox Home Entertainment and…

"He Stopped Loving Her Today" is a song recorded by American country music artist George Jones. It has been named in several surveys as…

A head shadow (or acoustic shadow) is a region of reduced amplitude of a sound because it is obstructed by the head. It is an example of…

A head-related transfer function (HRTF) is a response that characterizes how an ear receives a sound from a point in space.

A headphone amplifier is a low-powered audio amplifier designed particularly to drive headphones worn on or in the ears, instead of…

In digital and analog audio, headroom refers to the amount by which the signal-handling capabilities of an audio system can exceed a…

A headshell is a head piece designed to be attached to the end of a turntable's or record player's tonearm, which holds the cartridge…

Healing the deaf mute of Decapolis is one of the miracles of Jesus recorded in chapter 7 of the Gospel of Mark. Its narration offers many…

Noise health effects are the physical and psychological health consequences of regular exposure to consistent elevated sound levels.

Hearing, or auditory perception, is the ability to perceive sounds through an organ, such as an ear, by detecting vibrations as periodic…

A hearing aid is a device designed to improve hearing by making sound audible to a person with hearing loss. Hearing aids are classified…

Hearing conservation programs are programs implemented to reduce the risk of hearing loss due to hazardous noise exposure, if implemented…

Hearing loss is either a partial inability to hear, or a total inability termed deafness. Hearing loss may be present at birth or acquired…

Hearing loss in diabetes is a form of hearing impairment resulting from type 2 diabetes mellitus. Type 2 diabetes mellitus (T2DM) is…

A hearing protection device, also known as an HPD, is an ear protection device worn in or over the ears while exposed to hazardous noise…

Hearing protector fit-testing is a method that measures the degree of noise reduction obtained from an individual wearing a particular…

Hearing range describes the frequency range that can be heard by humans or other animals, though it can also refer to the range of levels.

A hearing test provides an evaluation of the sensitivity of a person's sense of hearing and is most often performed by an audiologist…

Heavy metal bass is the use of the bass guitar (also called "electric bass") in the rock music genres of heavy metal and hard rock.

Height channels are audio channels in surround sound multichannel audio. Height channels are located above the listening area and increase…

Helical scan is a method of recording high-frequency signals on magnetic tape, used in open-reel video tape recorders, video cassette…

Helmholtz pitch notation is a system for naming musical notes of the Western chromatic scale. Fully described and normalized by the German…

Helmholtz resonance, also known as wind throb, refers to the phenomenon of air resonance in a cavity, an effect named after the German…

Hensen's cells are a layer of tall supporting cells around the outer hair cells (OHC) in the organ of Corti in the cochlea. Their…

In musical tuning systems, the hexany, invented by Erv Wilson, represents one of the simplest structures found in his combination product…

In music and music theory, a hexatonic scale is a scale with six pitches or notes per octave. Famous examples include the whole-tone…

Hi-MD is a magneto-optical disc-based data storage format. It was a further development of the MiniDisc. With its release in late 2004…

A hidden message is information that is not immediately noticeable, and that must be discovered or uncovered and interpreted before it can…

In the field of recorded music, a hidden track (sometimes called a ghost track, secret track or unlisted track) is a song or a piece of…

High Definition Compatible Digital (HDCD) is a proprietary audio encode-decode process that claims to provide increased dynamic range over…

High dynamic range (HDR), also known as wide dynamic range, extended dynamic range, or expanded dynamic range, is a signal with a higher…

High fidelity (hi-fi or, rarely, HiFi) is the high-quality reproduction of sound. It is popular with audiophiles and home audio enthusiasts.

High Fidelity Pure Audio, occasionally abbreviated as HFPA or BD-A, is a marketing initiative, spearheaded by Sony Music and Universal…

High-dynamic-range rendering (HDRR or HDR rendering), also known as high-dynamic-range lighting, is the rendering of computer graphics…

High-dynamic-range television (HDR-TV) is a technology that uses high dynamic range (HDR) to improve the quality of display signals. It is…

HFIM, acronym for high-frequency-impulse-measurement, is a type of measurement technique in acoustics, where structure-borne sound signals…

High-resolution audio is a term for music files with bit depth greater than 16-bit and sampling frequency higher than 44.1 kHz or 48 kHz…

HiPac (stylized as HIPAC), is an audio tape cartridge format, introduced in August 1971 on the Japanese consumer market by Pioneer and…

It is generally recognized that the first radio transmission was made from a temporary station set up by Italian engineer Guglielmo…

The first hearing aid was created in the 17th century. The movement toward modern hearing aids began with the creation of the telephone…

The establishment of schools and institutions specializing in deaf education has a history spanning back across multiple centuries. They…

Multitrack recording of sound is the process in which sound and other electro-acoustic signals are captured on a recording medium such as…

The history of sound recording, which has progressed in waves, driven by the invention and commercial introduction of new technologies…

Hit Stix is a toy electronic musical instrument manufactured by Nasta and Radio Shack in the 1980s. A set of Hit Stix consists of two drum…

HitClips is a digital audio player created by Tiger Electronics that plays low-fidelity mono one-minute clips of usually teen pop hits…

A recording of a conversation between Adolf Hitler, the dictator of Nazi Germany, and Carl Gustaf Emil Mannerheim, the Commander-in-Chief…

"Hitsville U.S.A." is the nickname given to Motown's first headquarters and recording studio. The house (formerly a photographers' studio)…

The Hollywood Studio Symphony (sometimes the Hollywood Freelance Studio Symphony) is the credited name of the symphony orchestra behind…

The Holographic Versatile Disc (HVD) was a proposed optical disc technology designed to store up to several terabytes of data on a 10 cm…

Microsoft HoloLens 2 is a augmented reality (AR) and mixed reality head-mounted display developed and manufactured by Microsoft. It is…

Holophonics is a binaural recording system created by Hugo Zuccarelli that is based on the claim that the human auditory system acts as an…

Home recording is the practice of recording sound in a private home instead of a professional recording studio. A studio set up for home…

A home theater in a box (HTIB) is an integrated home theater package which "bundles" together a combination DVD or Blu-ray player, a…

Home ultrasound is the provision of therapeutic ultrasound via the use of a portable or home ultrasound machine. This method of medical…

The HomePod is a series of smart speakers developed by Apple. Designed to work with the Apple Music subscription service, the HomePod…

Homotonal (same-tonality) is a technical musical term that describes the tonal structure of multi-movement compositions. It was introduced…

Hongzhi Zhengjue (Chinese: 宏智正覺; pinyin: Hóngzhì Zhēngjué; Wade–Giles: Hung-chih Cheng-chueh, Japanese: Wanshi Shōgaku), also sometimes…

"Hoochie Coochie Man" (originally titled "I'm Your Hoochie Cooche Man") is a blues standard written by Willie Dixon and first recorded by…

An acoustic horn or waveguide is a tapered sound guide designed to provide an acoustic impedance match between a sound source and free air.

A horn analyzer is a test instrument dedicated to determine the resonance and anti-resonance frequencies of ultrasonic parts such as…

Horn Massive is a 2.25-ton (4,500 lbs) 3.5 x 3.1 x 4 m mobile 2,000-watt steel and aluminum horn sound system powered by a commercial…

The hot chocolate effect is a phenomenon of wave mechanics in which the pitch heard from tapping a cup of hot liquid rises after the…

"Howl", also known as "Howl for Carl Solomon", is a poem written by Allen Ginsberg in 1954–1955 and published in his 1956 collection, Howl…

Howling is a vocal form of animal communication seen in most canines, particularly wolves, coyotes, foxes, and dogs, as well as cats and…

Human echolocation is the ability of humans to detect objects in their environment by sensing echoes from those objects, by actively…

Hurler syndrome, also known as mucopolysaccharidosis Type IH (MPS-IH), Hurler's disease, and formerly gargoylism, is a genetic disorder…

The Huygens–Fokker Foundation (Dutch: Stichting Huygens-Fokker) is a "centre for microtonal music" founded on February 15, 1960, housed in…

A hybrid disc is a disc, such as CD-ROM or Blu-ray, which contains multiple types of data which can be used differently on different…

Hybrid log–gamma (HLG) is a transfer function jointly developed by the BBC and NHK for high dynamic range (HDR) display. It is backward…

Hymnen (German for "Anthems") is an electronic and concrete work, with optional live performers, by Karlheinz Stockhausen, composed in…

The Hyper CD-ROM is a claimed optical data storage device similar to the CD-ROM with a multilayer 3D structure, invented by Romanian…

Hyperacusis is an increased sensitivity to sound (including pain) and a low tolerance for environmental noise. Definitions of hyperacusis…

Hyperion Ensemble is a Romanian chamber music ensemble based in Bucharest. It was founded in 1976 by composer Iancu Dumitrescu and…

The hypersonic effect is a phenomenon reported in a controversial scientific study by Tsutomu Oohashi et al., which claims that, although…

HyperSpike is a brand name for acoustic products manufactured by Ultra Electronics – Undersea Sensor Systems Inc. (USSI), in Columbia…

Hystero contrast sonography (HyCoSy) is an ultrasound procedure intended to diagnose structural defects of the female reproductive system…