Effect of the enclosure (1)
Rear surface of a loudspeaker radiates into a resonant system which presents:
compliance
due to the compressibility of the air inside a volume,
acoustic mass
due to the inertia of the air in a vent. The term
represents a length correction due to the discontinuity effects at the input and at the ouput of a vent. Radiation resistance is neglected here.resistance Raf which represents the losses inside the enclosure (often neglected). This resistance determines a quality factor of the system
(often between 5 and 10 for a neat enclosure).
