Compact audio playback systems may experience a noticeable reduction in bass fidelity during music reproduction. Bass enhancer extends the physical limitation of loudspeaker playback range by generating the virtual Bass. Bass Enhancer helps to enhance the perception of existing bass content.
Speakers have physical frequency range in which audio is reproduced well. Frequencies lower than this range are highly attenuated by the speaker. Bass enhancer first extracts the low frequency signal below the speaker cutoff frequency. Then, Bass enhancer adds the harmonics generated for each frequency component in the low frequency signal to original signal. These added harmonics are in the speaker physical frequency range and the signal is perceived as the lower frequency. This is also called virtual bass.This is equivalent to extending the lower limit of speaker’s frequency range.