Create rapid beeping tone in matlab

I am trying to use sound( ) or some other function to create a rapid beeping tone at a specified frequency. The sound( ) function only seems to let me create a continuous smooth tone, is there a way to create a discontinious tone that beeps rapidly?

Answer 1

[DGM]

Depends how you want to do it. I bet there's lots of ways.

I just made a piecewise signal and played it.

fs = 8192;
toneduration = 0.1;
spaceduration = 0.05;
tonefreq = 800;
nbeeps = 15;

t = linspace(0,toneduration,round(toneduration*fs));
y = 0.8*sin(2*pi*tonefreq*t); % tone
ys = zeros(1,round(spaceduration*fs)); % space

Y = [repmat([y ys],[1 nbeeps-1]) y]; % the whole signal

sound(Y,fs);

If you didn't want to have to generate the entire vector, maybe you could just use the y vector by itself and then play it in a loop, pausing afterwards each time. That would allow beeping indefinitely without needing a giant precalculated vector, but you'll have to wrangle the audio tools such that they behave as needed.

Something like this:

fs = 8192;
toneduration = 0.1;
spaceduration = 0.05;
tonefreq = 800;
nbeeps = 15;

t = linspace(0,toneduration,round(toneduration*fs));
y = 0.8*sin(2*pi*tonefreq*t);

a = audioplayer(y,fs);
for k = 1:nbeeps
    play(a)
    pause(spaceduration)
end

I couldn't get this to work using sound(). Audioplayer seems to work, but it's glitchy.