The acoustic calibration of a loudspeaker system is normally performed in bounce-free chambers designed for this specific purpose.
The goal is to eliminate environmental interference, ensuring the precision of all measurements and tests. The geometry of a domestic setting, however, completely shapes a speaker’s response, thereby modifying the listening experience, sometimes dramatically.
Since there are limitless speaker/room/furniture combinations, computer-aided simulation can only outline general performance parameters that are useful for assessing reproductive balance, but might not sufficiently account for the listening experience.
Since any free-standing “tower” system has a fixed driver-to-floor distance, once the listening distance has been established, distortion caused by initial floor bounce can be calculated.
This type of interference results in the loss or excess of energy within a frequency band, usually an octave wide; which generally resembles the central octave of a piano. In other words, the set of musical notes most recurrent in western compositions are diminished. By eliminating bouncing surfaces within a meter however, subsequent contact with the floor can be controlled by a specific arrangement of the crossover filter and vertical driver array.
The correlation between the deeps and peaks of octaves implies dramatic timbre alteration in the complex tone generated by the sound source, because floor bounce can translate to a difference of almost 10 dB between the fundamental frequency and the second harmonic