is there a way to put some threshold and count the number of times whenever the signal becomes above the threshold?

is there a way to put some threshold and count the number of times whenever the signal becomes above the threshold, and depending on the number of times it takes some decision automaticlly

[Dyuman Joshi]

Counting the numbers of ways -

th=0.6;
%signal with values between 0 and 1
data=rand(1,10)

data = 1×10

0.6308 0.8748 0.8553 0.4317 0.3822 0.8994 0.3885 0.7637 0.4268 0.4580

val=nnz(data>th)

val = 5

For the latter part, you can use if-else or switch, and define the tasks accordingly.

[tamim]

my signal is recoded signal from a mic it's not a rand data

[Dyuman Joshi]

Is it in a numeric form? If yes, then the code still applies.

If not, you should have mentioned that in the question itself, rather then telling it afterwards.

[tamim]

it is a recorded signal

[Dyuman Joshi]

What is the data type? Numbers?

Attach your data as well.

[tamim]

this is my code, it record the sound and plot it

Answer 1

[Image Analyst]

Sure. Use bwlabel if you have the Image Processing Toolbox.

[L, count] = bwlabel(data >= someThresholdValue)

count is the number of runs of your data at or above the threshold value.

Answer 2

[Jan]

So currently you did not store the signal in a variable at all, but you directly plot it. Replace:

plot(recObj.getaudiodata());

by

signal = recObj.getaudiodata();
plot(signal);

Now you have a signal and can count the frames, which exceed the threshold.