Glossary (L)

Glossary terms, covering electronic products with the letter L

Letterbox

View films on television by adding a 4/3 black bars above and below to keep the panoramic format.

Link

Clickable text leading to a web page, usually on the Internet, containing information and/or additional content.

Lithium Ion

Battery technology that is both light and has a high capacity. It also offers the advantage of having no memory effect and has the ability to recharge to its full capacity.

Litz (Wire)

With a standard cable, high frequencies generally induce an increase in the impedance of the cable, which can affect the quality of the audio. Litz wire is a lead wire designed specifically to be adapted to the transmission of these higher frequencies. The strands making up each wire are electrically isolated from each other and are then braided, thereby avoid proximity effects and helps to maintain the low impedance nature of the copper used for the cable.

Larsen (Effect)

Acoustic loop between a microphone and a loudspeaker resulting in a hiss. It is heard especially on the performance stage. Some guitarists use this phenomenon to create resonances with an electric guitar by placing them very close to their amp. Acoustic feedback may lead to the destruction of speakers and/or microphone.

LaserDisc

LaserDisc is the ancestor of the DVD and Blu-ray player. It was a video disc 20 or 30 cm in diameter, containing video - analog - digital sound sometimes encoded in Dolby Digital.

LCD

LCD (Liquid Crystal Display). This type of display does not emit light and requires a light source. There are many LCD technologies adapted to video, television displays, computers, et cetera. LCD technology uses 3 semi-transparent plates (one for each colour component) illuminated by a light beam passing through them. The plates are composed of many cells, themselves containing sensitive liquid crystal to the electric current. This stimulates the cells that become more or less transparent (or opaque) to compose a bright, high contrast image on the screen.

Loudness

This function boosts bass and treble to obtain a balanced sound when listening at low volumes. The human ear is most sensitive to midrange frequencies, and we tend not to hear the low and high frequencies at low volume, hence the interest in the Loudness function.