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notch filter
This term is a technical specification used primarily in electrical engineering, audio processing, and signal analysis. It describes a high-precision tool designed to eliminate a single, problematic frequency—such as electrical mains hum—without distorting the surrounding spectral content. This distinguishes it from a low-pass or high-pass filter, which removes entire ranges of frequencies.
In practical application, the term is used in both hardware (analog circuits) and software (digital signal processing). Because it targets a specific "notch" in the frequency response, it is characterized by its selectivity and narrow bandwidth, making it indispensable for cleaning audio recordings or stabilizing sensor data in industrial environments.
Meanings
Examples
The audio engineer applied a notch filter to remove the 60 Hz hum from the recording.
We need a notch filter to eliminate this specific interference frequency.
A notch filter is ideal for removing a single unwanted frequency without affecting the rest of the signal.
A notch filter is ideal for removing a single unwanted frequency without affecting the rest of the signal.
I wonder if a digital notch filter would be more precise than an analog one for this project.
The ECG machine uses a notch filter to block power line noise from the heart signal.
Just slide the notch filter over to the frequency where the feedback is peaking.
The circuit design incorporates a high Q notch filter for maximum selectivity.
Can you check if the notch filter is properly tuned to the center frequency?