How to create a pulsing sound/use duty cycle

John Michell answered . 2025-07-05 21:54:25

It seems that nSeconds should be 0.5s. Each pause should be also 0.5s. Thus it repeats 60 time in a min.

 

Fs = 8000;      %# Samples per second
tone1 = 480;    %# Tone 1 frequency, in Hertz
tone2 = 620;    %# Tone 2 frequency, in Hertz
nSeconds = 0.5;   %# Duration of the sound
ns = round(nSeconds*Fs);
t = (0:ns-1)'/Fs;

y = sin(2*pi*tone1*t)...    % Dual tone frequency
  + sin(2*pi*tone2*t); 

y = [y; zeros(ns,1)];       % add pause

y = repmat(y, 60, 1);       % repeat 60 times

plot((0:length(y)-1)/Fs, y)

 

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