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  • Acoustics: An electronic filter which only allows frequencies above a set point to pass. Frequencies below the set point are eliminated. Typical filter points are 80 - 100 Hz which helps eliminate stage rumble, popping sounds, and 60-cycle hum. Also called a low-cut filter The point at which it begins blocking is called the crossover point. Source: Church Audio & Acoustics Glossary
  • Electronics: A circuit so designed that it will transfer signals of high frequency while attenuating those of low frequency.