"What is the difference between hearing and listening? Once sound has entered through our ears, we begin to perceive through various listening modes. As our sight is influenced by psychological principles (known as Gestalt) and forms of illusion, so is our hearing. The perception of space, time, and tone follows certain rules laid down by our sensory system and processed by our brain, while entrainment is a special case of our body and mind being able to synchronise with an external rhythm that can then induce a specific physical or psychological state. Understanding how the potential, limitations, and quirks of our physiological and mental capacities influence our perception of the world through sound, will guide us towards concepts that can be applied in cinema."

Sound Design: the expressive power of music, voice, and sound effects in cinema, David Sonnenschein, Michael Wiese Productions, 2001, p.77