Sound System

Working with audio means working with sound systems. Naturally, the range of systems available for different applications is enormous. However, all electronic audio systems are based around one very simple concept: To take sound waves, convert them into an electric current and manipulate them as desired, then convert them back into sound waves.Sound system is the name used to designate speakers, amplifiers, music sources, the choice of the system depends on the desired area to install it and also the type of application intended. The intensity of sound, "volume" is measured in decibels (dB).

Transducer

A device which converts energy from one form into another. The two types of transducers we will deal with are microphones (which convert acoustical energy into electrical energy) and speakers (which convert electrical energy into acoustical energy).

Amplifier

A device which takes a signal and increases its power.

• The process begins with a sound source (such as a human voice), which creates waves of sound (acoustical energy).
• These waves are detected by a transducer (microphone), which converts them to electrical energy.
• The electrical signal from the microphone is very weak, and must be fed to an amplifier before anything serious can be done with it.
• The loudspeaker converts the electrical signal back into sound waves, which are heard by human ears.

Signal processors

Devices and software which allow the manipulation of the signal in various ways. The most common processors are tonal adjusters such as bass and treble controls.