Lets talk about reflections in a little more detail because they are very important in the mid and high frequencies. Yes, low frequencies reflect too, but because of their large wavelength they don't tend to reflect at angles, they just bounce between opposing surfaces. In the specular range, we can consider reflections to seem like a source of sound in their own right, coming from behind the boundary. Just as when looking at yourself in a mirror, it seems like a person is behind it, not on...
