A deep dive into the AV audio technology world

Audio & Speech Systems

Definition of an AV Audio and Speech system

Audio and Speech systems are used as part of larger AV system installations to provide sound to the visual aspect of AV tech.
Almost every AV system consists of hardware that outputs sound and hardware that shows video or images.

Key aspects of Audio and Speech systems

Audio systems can be roughly divided into two types.
Even though we classify 2 separate types of audio systems in the real world
there is AV hardware that can perform both tasks at the same time.

1. Program systems

Program systems are used for reproducing sound and audio. In these systems there isn’t a microphone. The audio they produce is pre-recorded and played from a source.

2. Sound Reinforcement systems

Sound reinforcement systems are used for amplifying sounds and music. They are used for amplification of music as well as speech. They are usually used in concerts or during live events and presentations.

ITSL-Audio&speech-systems

What makes a good Audio and Speech system

There are several different factors to take into account for properly gauging the quality
of an Audio Speech system and all of them are highly dependent on use cases.
An audio solution for a live musical event will have different requirements than one for an office space

Let’s have a look at how the quality of
Audio and Speech systems can be defined

Intelligibility

Intelligibility is an important parameter when we’re looking at speech enhancement audio systems. When a speech enhancement system achieves high intelligibility it means that the listeners are getting clear and undistorted speech that is easy to understand. Words are not muffled & there is no background noise or popping.
Overall the audio should feel like you are talking to someone face to face. Listeners shouldn’t feel like they’re at a concert, the audio should be natural.

Clarity

Since instruments produce sound at different frequencies (lower/higher) the speakers also need to cover a wide range of frequencies. If that’s not the case then some instruments may be hard or completely impossible to hear. This happens because the speakers of your headphones simply don’t cover the frequencies of some instruments. Music industry pros would refer to the missing frequencies as having bad lows if the base is low or bad highs if the high vocal or instrumental tones are not represented well.

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