Virtual bass system with fuzzy separation of tones and transients

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A virtual bass system creates an impression of bass perception in sound systems with weak low-frequency reproduction, which is typical of small loudspeakers. Virtual bass systems extend the bandwidth of the low-frequency audio content using either a nonlinear function or a phase vocoder, and add the processed signal to the reproduced sound. Hybrid systems separate transients and steady-state sounds, which are processed separately. It is still challenging to reach a good sound quality using a virtual bass system. This paper proposes a novel method, which separates the tonal, transient, and noisy parts of the audio signal in a fuzzy way, and then processes only the transients and tones. Those upper harmonics, which can be detected above the cutoff frequency, are boosted using timbre-matched weights, but missing upper harmonics are generated to assist the missing fundamental phenomenon. Listening test results show that the proposed algorithm outperforms selected previous methods in terms of perceived bass sound quality. The proposed method can enhance the bass sound perception of small loudspeakers, such as those used in laptop computers and mobile devices.
Original languageEnglish
Title of host publicationProceedings of the International Conference on Digital Audio Effects
Number of pages8
Publication statusPublished - 9 Sept 2020
MoE publication typeA4 Conference publication
EventInternational Conference on Digital Audio Effects - Virtual (Initially Vienna), Vienna, Austria
Duration: 9 Sept 202011 Sept 2020
Conference number: 23

Publication series

NameProceedings of the International Conference on Digital Audio Effects
ISSN (Print)2413-6700
ISSN (Electronic)2413-6689


ConferenceInternational Conference on Digital Audio Effects
Abbreviated titleDAFx
Internet address


  • Acoustics
  • Acoustic distortion
  • Digital signal processing
  • Harmonic analysis
  • Psychoacoustics


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