Intelligent Sound

Equalization is a process in which active and passive electronic elements are used for fulfilling the purpose of altering the frequency response characteristics of any given system. Although the term, Equalization is used in many contexts, it generally points towards amplitude equalization. But there are other significant types of equalization. They are time-delay and phase equalizations. Spatial directivity equalization is another type of equalization.

Uses:

In the field of sound reinforcement systems and multitrack recording, separate channels comprise of equalization for artistic purposes, while the collective blend of sound gets processed via equalization for realistic reasons. An aural space will be the cause of a few sound frequencies being louder than the others. This is because of the standing waves created by the expanse of the room and the equipment inside it. Equalization can be used to balance the discrepancies in a room's acoustics. Preferably, a sound system will create a frequency response which is relatively flat. The frequency response of any room is inspected with the help of a Spectrum analyzer. Generally, a graphic equalizer, with identical frequency bands, is utilized to balance the room acoustics. This is a regular practice for some high fidelity sound systems, sound recording studios, and live sound reinforcement systems.

Equalization may also be used in any live event, in which speakers and microphones operate concurrently. Most of the audio records have applied equalization to the sound waveform. This was before the consumers' record was made to eliminate the limitations of equipment for manufacturing and recording. One of the schemes was used earlier than 1940. Close to 100 formulae were utilized until 1955. It was then that the RIAA standard formula was imposed.

For example, low frequencies get diminished before the sound is marked onto the vinyl, making the groove occupy less physical space so that more and more music can fit in the record. For the same reason, record players enhance the low frequencies back up to their original levels before playback, to balance the reduction while printing.