How to Make a Notch Filter for the U8903A Audio Analyzer
Publication Number: 5990-4967EN
Publication Date: 2014.07.31
Language: English
Application Notes

How to Make a Notch Filter for the U8903A Audio Analyzer

Show Description

This application note assists you in creating your own customized notch filter for your audio analysis by using a VEE program. The VEE program will help you to create an FIR digital filter to be used in your U8903A. You can have the option of installing the notch filter permanently into your U8903A nonvol tile memory or of recalling the filter when it is needed from a PC through IO connectivity.

Back to Basics

What is an audio filter?

Any medium that an audio signal passes through, whatever its form, can be regarded as a filter. Filters are usually used to discriminate between a frequency or a band of frequencies from a given signal, which is normally a mixture of both desired and undesired signals. The undesired portion of the signal commonly comes from noise sources such as power line hum, which are not required for a particular application.