How to make an audio processing device for noise reduction ?

[hugo_faurand]

Hello everyone !I am working on noise reduction and I wanted to do some experiments with an arduino. I took an arduino which get music (as an example) in input by jack. It also has a microphone and in a first try the goal is to get as an output the music - the noise around... To act like a kind of noise reducing system. Then I will do a better signal treatment. The goal is to use the system as an audio treatment unit.Here's a simple sketch and the system to amplify the audio signal.

Some of you must be laughing. In fact I realized that an arduino can not do that in real time. So I wonder is it possible to do that maybe with a board similar to an arduino board ? I think it's also difficult with a Raspberry Pi, not because of the specs of Raspberry's CPU but it is much less handy to work on electrical signals on a Raspberry.

Thanks in advance !

 

[Averagesupernova]

You've basically shown a couple of block diagrams with a little extra detail. So, yes. Laughing. There are various schemes used to suppress various types of noise. What type of noise are you trying to suppress and what research have you done so far?

 

[DaveE]

If you are willing to skip real time processing, then you can use Arduino to post process and replay audio. Depending on your algorithms it may take a while to post process, or it may be fast enough for real time.

You can split this project into HW and SW. The DSP SW can be developed on lots of platforms, including a PC. This is the real value added learning, IMO. The HW can be bought in many different forms. For example some of the ARM uC boards are cheap and powerful. For example Beagle Bone, which is definitely powerful enough for audio processing.

 

[berkeman]

Some of you must be laughing. In fact I realized that an arduino can not do that in real time. So I wonder is it possible to do that maybe with a board similar to an arduino board ?

Back in the day, TI's TMS320 was a good DSP platform to develop signal processing applications on. It looks like the product line is still going strong with lots of variants of the original TMS320. Check out the background information at Wikipedia:

https://en.wikipedia.org/wiki/Texas_Instruments_TMS320

Then look through the various development kits you can get to start prototyping your DSP experiments:

https://www.mouser.com/c/embedded-s...ECP34xpyV5AvIoURsQrFV-UEGLch9LN4aAjPXEALw_wcB