Pronunciation: [ˈiːkwəlˌa͡ɪzə] (IPA) 
The word "equaliser" is spelled with an "s", which is pronounced as a "z" sound, not "c". In IPA phonetic transcription, it is spelled as /ˈiːkwəlaɪzə(r)/. This word is commonly used in music and audio engineering to refer to a device that balances or adjusts the frequency response of audio signals. It is also used in sports to refer to a goal or point scored that evens out the score between opposing teams.
An equaliser, commonly referred to as an EQ, is a device or component used in audio systems to adjust and balance the frequency response of audio signals. It enables the adjustment of the loudness or volume of specific frequency ranges within an audio signal, allowing for a more accurate and pleasing sound reproduction. The purpose of an equaliser is to achieve a desired tonal balance by attenuating or boosting selected frequencies.
Typically featured as a digital or analog device, an equaliser consists of several individual filters known as bands, each responsible for controlling a range of frequencies. These bands are usually adjustable in terms of their center frequencies, bandwidths, and gain levels. The most common types of equalisers include graphic equalisers, parametric equalisers, and shelving equalisers, catering to various audio applications.
Equalisers are widely used in audio production, sound reinforcement systems, recording studios, home theater setups, and music playback devices. They allow sound engineers and music enthusiasts to tailor the audio output according to their preferences or varying environmental conditions. By reducing excessive bass or treble, improving clarity, and correcting frequency imbalances, equalisers help to enhance the overall listening experience and minimize audio inconsistencies. Overall, equalisers provide a powerful tool for audio fine-tuning and adjustment, aiding in achieving an optimized and balanced audio reproduction.
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Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "equaliser" originated from the noun "equalize", which came from the Old French term "egaliser". "Egaliser" is derived from the Latin word "aequalis" meaning "equal". The noun form "equalizer" was first recorded in the English language in the mid-19th century, referring to a person or thing that equalizes. Later, in the context of audio technology, "equalizer" was used to describe a device that adjusts or balances different frequency bands in audio signals, thus ensuring equalization or equal treatment of sound components. Over time, the noun "equalizer" transformed into the variant "equaliser" in certain regions, such as British English.
