|
|
Spectral Fidelity Preservation (SFP) Apherma devices employ an algorithm of Spectral Fidelity Preservation (SFP, patented) to overcome spectral distortion problems. Its function is to optimize audibility for soft speech and preserve phonemic signature for normal and loud speech. Showing as below, the combination of the Apherma WDRC and SFP would produce a contrast of about 15 dB, largely preserving the original spectral contrast. With this unique feature, the Apherma aids produce sounds of unparalleled clarity.  Spectral Fidelity Preservation maximizes the clarity of the output signal. |