What we perceive as reverb is a combination of two things, called early reflections and late reflections. Early reflections are the first reflections of the source sound that make it back to our ear; they are the reflections that travel out, reflect off of something once, and head back. Late reflections are the reflections that spend time bouncing off of multiple surfaces before returning to our ear. Because we experience such a large number of reflections arriving at our ears so closely together, we do not hear them as individual, echoed copies – instead, we get the smooth sound of reverberation.