LA Audio Electronic EQ231G-SP Applications & Techniques, Some Examples Room equalisation

User Manual

4. Applications & Techniques

4. Applications & Techniques

A graphic equaliser may be used in numerous situations, in many different ways. It is impossible to document every implementation, but we hope that the following examples will serve as a useful starting point.

4.1.Some Examples

a)Room equalisation

Every room, whether it be in a studio, theatre or home has a different acoustic response, depending upon room dimensions, fixtures and fittings and any other absorptive or reflective materials such as people, tables or mixing consoles. A graphic equaliser may be used to "correct" the room, i.e. tailor the sound being reproduced so that the room appears to have an even or "flat" response throughout the audio frequency range, thus providing a correct reproduction of the original sound, improved intelligibility, or helping to achieve loud volumes without an abrasive tonal character.

There are several ways of measuring a room's frequency response, and these are usually all similar in technique, although differing in hardware. Using a Real-time analyser, inconsistencies in the system’s frequency response can be detected and corrected with the graphic EQ. Alternatively, adjustments can be made by ear in response to trial system output, such as CD playback. It is important to remember that the ear responds differently to the frequency spectrum at different volumes, so adjustments made by ear should be done at or around the intended operational volume.

While the graphic equaliser is a powerful tool, it is worth noting that speaker positioning and balancing along with room adjustments such as using drapes will often prove to be more effective solutions to balance issues than heavy-handed equalisation. The graphic EQ is usually best for fine-tuning system response.

b) Sound-shaping

The graphic equaliser may be used to change an original sound to make it more pleasing to the ear or to blend it in with other audio signals without overlap. This

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