Notch filter

1. What is a notch filter used for?
2. Why notch filter is used in ECG?
3. What is another name for a notch filter?
4. What is a notch filter in EQ?

What is a notch filter used for?

Notch filters are used to remove a single frequency or a narrow band of frequencies. In audio systems, a notch filter can be used to remove interfering frequencies such as powerline hum. Notch filters can also be used to remove a specific interfering frequency in radio receivers and software-defined radio.

Why notch filter is used in ECG?

Several kinds of notch filters (analog and digital) were implemented for evaluation of the distortion caused on ECG signals. These filters were applied to ECGs of humans and rats and then distortion estimates were computed from their resulting signals.

What is another name for a notch filter?

A Notch Filter is also known as a Band Stop filter or Band Reject Filter. These filters reject/attenuate signals in a specific frequency band called the stop band frequency range and pass the signals above and below this band.

What is a notch filter in EQ?

The Filter and EQ > Notch Filter effect removes up to six user‑defined frequency bands. Use this effect to remove very narrow frequency bands, such as a 60 Hz hum, while leaving all surrounding frequencies untouched. Note: To remove shrill “ess” sounds, use the Sibilance Softener preset.