A beam control system and method. The apparatus provides a spectral intensity distribution of an input source wherein individual spectral components in the source can be measured and, in some embodiments, can be manipulated or filtered. The imaging device includes an image sensor, a focusing lens, a lens driver, an image generator, a magnification changing rate obtaining unit, and a size changer. An augmentation material is formed on the plurality of spacers such that the inner or the outer sidewalls of the spacers are selectively expanded. The analyzer uses the relative timing of the timestamps and the speech recognizer’s outcome to determine whether the audio coupling is experiencing interference or echo. A method for operating the internal combustion engine is provided where the ambient pressure is determined using the crank casing pressure measured by the crank casing pressure sensor.