A diffused transmission relies on reflected light. With diffused transmissions, the emitters
have a wide-focused beam instead of a narrow beam. For example, the emitter might be
pointed at the ceiling of a room and use it as a reflection point. When the emitter transmits
an infrared signal, the signal bounces off the ceiling and fills the room with the signal. The
detectors are pointed at the same reflection point and can detect the reflected signal,