ABSTRACT
The sound is actually a concept that corresponds to the brain's perception and interpretation of a physical auditory stimulus. A transducer is any mechanical or electrical device that changes one form of energy into another corresponding form of energy. A waveform is the graphic representation of a sound-pressure level or voltage level as it moves through a medium over time. Sound has the inherent ability to diffract around or through a physical acoustic barrier. The ear perceives frequencies that are whole, doubled multiples of the fundamental as being related in a special way. Sound-pressure level is the acoustic pressure that's built up within a defined atmospheric area. Quite simply, the higher the SPL, the louder the perceived sound. Power is generally associated with audio signals that are carried throughout an audio production system. The area of psychoacoustics deals with how and why the brain interprets a particular sound stimulus in a certain way.
