Equalizer for PA system

• Main Author: Mokhtar, Mohd Ariffuddin
• Format: Undergraduates Project Papers
• Language: English
• Published: 2007
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://umpir.ump.edu.my/id/eprint/81/1/cd2634.pdf; http://umpir.ump.edu.my/id/eprint/81/

In audio processing, equalization is the process of changing the frequency envelope of a sound. In passing through any channel, frequency spreading occurs. In this project I have build 9 band graphic equalizer. The graphic equalizer has become very popular in recent years. It is called graphic because, as the front-panel sliders or knob are adjusted; their positions give an approximate display of the resultant frequency response. This device divide the audible spectrum into nine frequency bands, and allow adjustments to each band via its own boost/cut control gain from 1.17 to 6. A growing number of audio enthusiasts are using equalizers to adjust their stereo system's frequency response, whether to compensate for room acoustics, for PA system or for creative recording purposes. Instead of broad adjustments of treble, bass, and maybe the midrange (sometimes called presence), we now have independent control over the low bass, mid-bass, high bass, low midrange, and so forth.