It is also important to note that, within the world of audio, there are several species of equalizer to choose from. Some EQs allow control over just the lower bass and upper treble regions. Other units separate the audible spectrum into as many as 30 different ranges or bands. You’ll find some EQs on audio mixers that control the level of up to four frequency bands. More advanced EQs enable you to accurately control the frequency, width and level of each band.

The method for targeting and reducing high- or low- frequency noise depends on the type of equalizer you’re using. The more frequency bands an EQ offers, the easier it is to pinpoint and compensate for the specific offending sounds.