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How to Build Audio Filter Circuits - Circuit Basics

    https://www.circuitbasics.com/audio-filters/
    An audio filter is a circuit that has been designed to let certain audio frequencies pass in a signal but block other frequencies out. One example of an audio filter is the cross-over module in a loudspeaker box.

Audio Filters: Designing an audio equalizer – Part 7

    https://www.engineersgarage.com/audio-filters-designing-an-audio-equalizer-7-8/
    Equalizers can be designed using audio filters or integrated chips (such as an LA-3600, which is a five-band equalizer IC). For this project, we’ll design a three-band, graphic equalizer circuit using audio filters. So, it will have low, high, and band-pass filter circuits to separate the low, high, and mid-range frequencies of the audio signal.

Audio Filters: Understanding the filters - Part 5

    https://www.engineersgarage.com/audio-filters-basics-of-audio-filters-5-8/
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Analog Filters | Maxim Integrated

    https://www.maximintegrated.com/en/products/analog/analog-filters.html
    50:1 (MAX295/MAX296) Low Noise: -70dB THD + Noise (Typ) Operate with a Single +5V Supply or Dual ±5V Supplies. Uncommitted Op Amp for Anti-Aliasing or Clock-Noise Filtering. 8-Pin DIP and SO Packages. Printable Data Sheet. Learn More. MAX295 8th …

Audio Noise Filter Circuit - ElectroSchematics.com

    https://www.electroschematics.com/audio-noise-filter/
    audio filters. NE5532N. This audio noise filter circuit is a bandpass filter for audio frequency band. It filters unwanted signals that are lower or higher than the audio frequencies. It has 2 filters: a low pass filter and a high pass filter in a cascade configuration. Both filters are second-order filters with a 24 dB/octave fiter capability.

Analog Audio Filters - TI.com

    https://www.ti.com/lit/an/sloa152/sloa152.pdf
    Audio filters may be first, second or higher order. First and second order analog filters are generally well understood and their audio uses are somewhat limited, so they are examined briefly. The paper also examines biquadratic filters, or biquads, in more depth because they are more powerful tools for response compensation or EQ.

Home :: ic audio :: Voice Alarm EN54-24 :: 100V Audio …

    https://www.ic-audio.com/
    ic audio - the voice alarm experts. Certified manufacturer with more than 200 EN 54-24 certified loudspeakers in our catalog. Innovative products "Made in Germany", individual OEM solutions and custom-made designs are developed in the company …

The Magical Audio Filter - N5DUX homepage

    http://www.n5dux.com/ham/files/pdf/The%20Magical%20Audio%20Filter.pdf
    The Magica Audio Fil A variable-frequency notch filter plus a peaking circuit will do wonders for your reception. And this project will almost build itself. A udio filtering is a well- known process for improving receiver selectiv- ity and many articles have FO = I 27 ~4fi ALL RESISTORS 0 I% Fig. 1. Original circuit. been written on the subject.

15 Filter circuits using electronic coil | ElecCircuit.com

    https://www.eleccircuit.com/hum-filter-using-electronic-coil/
    There are many ways to filter the humming noise from the AC line (50 Hz) or audio signal away. This is a Hum Filter circuit using an electronic coil. Using a frequency filter is a simple way that includes RLC as the electronic coil. See figure below, the specific frequencies filter. The simple specific frequencies filter using RLC.

K4ICY's Home Brew CW Audio Filter

    http://www.k4icy.com/cwfilter.htm
    This little accessory will add the much needed narrow band filtering to your audio radio's output. The circuit used is an active RC driven filter using Op amps and is pre-constructed for a set frequency range. The circuit was inspired from the ARRL Extra Class study manual's (Volume 8) pages on active filters.

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