<span>The amount a wave diffracts depends on what 2 factors : </span><span>1) the wavelength 2) the size of the barrier. </span>As with all wave<span> diffraction </span>the amount<span> of diffraction will </span>depend<span> on the wavelength of the sound </span>wave<span> and </span>the size<span> of the gap the </span>wave<span> is travelling through. </span>