How to get zero output in matlab when you have two singals in input

I don't have a code. My question is what the procedure if i have one signal(sound of insect). And I've been told to sink this sound with the help of another sound to get zero output

Answer 1

[Image Analyst]

I don't know what "sink" means to you. Do you mean lower or decrease? Maybe you just want to multiply the signal by some scalar, such as 0 or 0.1???

scalingFactor = 0.1;
signal = signal * scalingFactor;

I also don't know how the second signal would be used. But if you want zero output, you don't need the second signal, you can simply do

signal = 0;

[Muhammad Abuzar]

Actually by sink means that i have a sound of cricket (insect) and I'll ve looking for the another sound which will have a frequency spectrum nearly equal to freq of cricket and such that they cancel the effect of each other snd i get zero output or output nearly equal to zero . Actually it's my nini project

[Image Analyst]

then you can just negate the sound of your first signal and add it to it.

secondSignal = -firstSignal;
result = firstSignal + secondSignal; % Result will be zero.

If you have an existing library of second signals, then you just need to make sure they're the same size and try them all to see which absolute value of the sum is least. That one should be the quietest after adding.

[Muhammad Abuzar]

What's the procedure for this? I mean there should be some different methods to execute the such tasks. I neans to bring both the signals in phase by selecting a small portion of the signals or . Can you pls tell me what should i do from the start to the end in detail. I'll be grateful 🥺

[Image Analyst]

@Muhammad Abuzar if you already have a second signal that you must use, and if your first and second signal need to be aligned before subtracting, you can refer to these instructions:

https://www.mathworks.com/help/signal/ug/align-signals-using-cross-correlation.html?s_tid=srchtitle_cross%20correlation_9