2 Electroacoustic sound system
2.1 Electroacoustic chain

The following figure shows an electroacoustic string with all important components (components):

Electroacoustic Chain Diagram

Microphone is a device at the beginning of the electroacoustic chain. It converts an acoustic signal into an electrical signal, which is further processed by other devices. Its quality fundamentally affects further processing of the sound.

Microphone types:

- manual
- headset
- on the goose neck
- lapel microphone
- desktop
- special (e.g. for musicians)

Wireless microphone (microport) is a microphone assembly with a connected transmitter and receiver. The transmitters are part of the microphone or are connected to the microphone by a short cable. The receiver receives a signal from the microphone-transmitter. Transmitters are powered by batteries; the receivers usually use a conventional power supply.

Although there are many recommendations on where to place speakers based on the type of use and acoustic environment, in practice two basic sound systems are the most commonly used:

1. The central sound system (single source assembly) can be a single speaker or a central set of several speakers. The central sound system is usually located in front of the presentation. Since the listener tends to turn towards the signal source, optimal position of speakers is next to the stage, screen or other points that are to get attention.

Central sound system

2. Decentralized sound system should be used in the case of insufficient ceiling height required for proper functioning of the central sound system, or when there is no need for a connection between the source of the signal and its reproduction. That is a set of more loudspeakers that are optimally distributed, mostly in suspended ceilings or hanging from the ceiling. Distribution systems are mostly used to amplify the spoken word or as calling systems (queue management systems).

Decentralized sound system