Sending two tones (Right and Left)

How can create a tone that works on the left or right only?. As you can see below, I have already created two sine waves with different frequences, so I'm trying to send one to the right and the other one to the left. Thanks in advance

fs= 8000; %frequency sample rate 
i=1/fs; 
t=0:i:10; %time axis 
a=10; % amplitude 


%Left Signal with F=440hz
f1 = 440;
x = a*sin(2*pi*f1*t);

%Right signal with F=660hz
f2 = 660;
y = a*sin(2*pi*f2*t);
plot(t,x,t,y);

[Rik]

Please don't delete your question. That is very rude. Also, why did you unaccept my answer?

[madhan ravi]

This behaviour is not tolerated in this forum!

[Rena Berman]

(Answers Dev) Restored edit

Answer 1

[Rik]

See this answer.

fs= 8000; %frequency sample rate 
i=1/fs; 
t=0:i:10; %time axis 
a=10; % amplitude 
%Left Signal with F=440hz
f1 = 440;
x = a*sin(2*pi*f1*t);
%Right signal with F=660hz
f2 = 660;
y = a*sin(2*pi*f2*t);

%merge into left and right
sound([x' y'],fs)

[Rik]

You can just add a 0 sound to the side you want to be silent:

fs= 8000; %frequency sample rate 
i=1/fs; 
t=0:i:10; %time axis 
a=10; % amplitude 
%Left Signal with F=440hz
f1 = 440;
x = a*sin(2*pi*f1*t);
%Right signal with F=660hz
f2 = 660;
y = a*sin(2*pi*f2*t);
% %merge into left and right
% sound([x' y'],fs)
sumsound=[x' zeros(size(x'));zeros(size(y')) y'];
sound(sumsound,fs)