A brief history of phase perception
The Georg Ohm’s acoustic law (1843) states that a musical sound is perceived by the ear as a set of a number of constituent pure harmonic tones. Later, Von Helmholtz agreed to the Ohm’s law and deepened his future researches saying that aural perception depends only on the amplitude spectrum of a sound and is independent of the phase angles of the various complements contained in the spectrum. Read More..
Does this replace DSP Processing? No, FirPHASE is built within the DSP and is designed to offset phase delays between frequencies without affecting frequency response..
RCF FiRPHASE processing uses this measurement and try to invert the loudspeaker’s phase without touching the amplitude equalization. The heart of the advanced technique used by FiRPHASE is a recursive method (Least Squares method) combined with a proprietary RCF algorithm that calculates the best FIR filter coefficients set in according to amplitude and phase constrains. The algorithm corrects phase and amplitude (if necessary) by taking into account the weak points of the transducers and the resonances or cancellations due to the cabinet of the loudspeaker. This technique permits to the designers a deep control of phase at mid-low frequency with relatively small filters, reaching a higher resolution than that one which theory suggests.
To read more about FirPHASE; download a copy of the complete White Paper by clicking HERE.