| 摘要 |
A sound signal is processed in two branches (10, 20). In first branch (10), the original signal (SOR) is maintained. In second branch (20), at least a portion (BW1; 63) of the original signal is fed to a non-linear device (22). This portion (BW1) preferably corresponds to the highest octave of the original signal. Non-linear device (22) produces harmonic frequencies (SHAR) with respect to frequency components received at its input. At least a portion (BW3; 65) of this resulting harmonic signal (S2; BW2; 64) is, optionally after attenuation or amplification, combined with original signal (SOR) from first branch (10), which possibly is delayed by a delay device (11). This combination may be a simple addition. Said portion (BW3; 65) of resulting signal (S2; BW2; 64) corresponds with a higher frequency portion (BW62) of the original spectrum, or is adjacent to the original spectrum (BWOR) at the high-frequency limit thereof.
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