Audio signal

Audio (Latin I hear of audire, hear ') is used as a component of words that have to do with hearing or sound (eg, audio system, audio meter, auditory ).

Audio refers to the range of human hearing, which includes the sound wave range of 16 Hz to 20 kHz. This area is within the human hearing characteristic and is in the upper part strongly age-dependent. The audible upper frequency limit can be aged up to 10 kHz and fall below it. Auditory perceptions are based normally on sound events, any semantic content of ( volume ) languages ​​, sounds or music. ( For Hörwahrnehmungen without physical correlate see universals of music perception, psychoacoustics, or tinnitus. )

With the proliferation of music systems, the term was commonly used as an abbreviation for Audio audio system and is particularly for the demarcation of pure music - tones of picture and movie applications (video, home cinema) used.

With the proliferation of multimedia-enabled computer word formations emerged in the information area with Audio: Real Audio, Compact Disc Digital Audio.

An audio signal, and audio signal is an electrical signal that conveys audio information. On many devices, consumer electronics, the term audio signal is also used to distinguish from the video signal.

The processing of audio signals and the conversion between sound and audio ( microphone signal) are the subject of sound engineering and signal processing.

In cinema, video and DVD movies, there are usually audio ( other languages) and movie tracks ( only the movie ) and audio channels (stereo, left, right).