Equalisers are devices used to balance and adjust sound frequencies to create a more pleasant listening experience. There are a variety of synonyms for equalisers including tone controls, audio equalisers, sound equalisers, and audio processors. Another commonly used term for equalisers is graphic equalisers, which refers to the visual representation of the adjustment levels in a graphic format. Other terms include frequency equalisers and EQs. Whatever term you use, the goal is to modify the sound output to create a balanced, clearer, and more vibrant sound experience for the listener. Different types of equalisers can be used in various settings, from home theatres to concert venues and recording studios.