lydsignalet

Ly dsignalet is a term used in Norwegian and Swedish to denote the audio signal, the electrical representation of sound used in recording, processing, and transmission. It can refer to an analog waveform or to a digital data stream that encodes sound, depending on the context.

In analog form, ly dsignalet is a continuously varying voltage or current whose instantaneous value corresponds to the acoustic pressure of the sound. In professional and consumer equipment, the signal is often described by reference levels such as line-level voltages (for example, around +4 dBu or -10 dBV) and a typical useful bandwidth near the audible range of 20 Hz to about 20 kHz. In digital form, the ly dsignalet consists of sampled data representing the sound, with common standards including sampling rates like 44.1 kHz or 48 kHz and bit depths of 16 or 24 bits.

The concept is central across domains such as recording, broadcasting, telecommunication, and consumer audio devices. In these contexts, the ly dsignalet may be transmitted, processed, or stored, and it is subject to amplification, filtering, compression, and encoding/decoding by mixers, cables, codecs, and digital workstations.

Etymologically, the term combines the words for sound or audio (ljud/lyd) with signal (signalet) in the Scandinavian languages, underscoring its role as the audible information carried by an electrical or digital system. Related topics include the analog audio signal, digital audio signal, signal processing, and loudness measurement.