use sound for a function

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konoha
konoha 2016-5-22
编辑： Todd Leonhardt 2016-5-22
I have a function f(t) = sin(t) + sin(3t/2) + sin(5t/4) and I am trying to use sound for f.
Fs=8000;
Ts=1/Fs;
t=[0:Ts:0.3];
sound(sin(t) + sin(3*t/2) + sin(5*t/4))
I keep getting error said not audio output, can someone show me how to make f sound? Thanks,

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回答（1 个）

Todd Leonhardt
Todd Leonhardt 2016-5-22
编辑：Todd Leonhardt 2016-5-22
The basic equation for a sine wave is:
y = A * sin(2*pi*f*t)
Sine Wave
Here f is the frequency in Hz.
Humans can hear from roughly 20 Hz to around 20 kHz, but with the high-end hearing getting worse as you get older. On computers with sub-par audio gear the lower end will be limited to more like 100 Hz.
Range of Human Hearing
You are trying to generate audio with frequencies less than 20 Hz.
Try the following:
sound(sin(2*pi*500*t), Fs)

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