Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

generate echo with convolution and cancel it

generate echo with convolution and cancel it

generate echo with convolution and cancel it

hello guys

i am beginner at using matlab

i want to generate echo on a sound file i recorded in wav and then made echo on it with convolution method.

and the second part cancel the echo

i dont know how to do it in matlab , i know formulas only .

any help i will be thankful


RE: generate echo with convolution and cancel it

thx :)

i have this code for do echo:

CODE --> matlab

%working code for echo in conv
x = zeros(1000,1);
x(1) = 1;
z= conv(x,y);
sound (z,Fs); 

i want remove the echo from the sound and get back original sound but with using convolution method only??!!

i tried this method

CODE --> matlab


N=25199; % delay in samples

y=z; % Signal with echo

x(1:N)=y(1:N); % First N samples of x and y agree

for i=N+2:length(y)

x(i)=y(i)-0.75*x(i-N); % Inverse filtering



plot(y); % Plot signal with echo



plot(x); % Plot signal without echo


soundsc(y); % Listen to signal with echo

soundsc(x); % Listen to signal without echo 

x sound only same as echo one and when reduce N samples to less .... there is echo come over the original one

any help plz??!!!

RE: generate echo with convolution and cancel it

yeah , it a project

i have a work code for cancel the echo:

CODE --> matlab


it works fine , but they want me use conv function to remove echo , i dont know how :\

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close