# fluctuation-strength-TUe

> Part of [LISQM](https://zhenxianli.github.io/LISQM/) (List of Implementations of Sound Quality Metrics), a list of open-source implementations of psychoacoustic metrics. Data as of 2026-10-28. Web page: https://zhenxianli.github.io/LISQM/projects/fluctuation-strength-tue.html

**Legacy project.** Not maintained. Its last commit was in January 2020, more than three years ago. Kept here for reference. Its code may follow an older edition and may not run with current software.

MATLAB code of the fluctuation strength model of Osses, García & Kohlrausch (2016) (`FluctuationStrength_TUe.m`), with the stimuli of the paper and a demo that reproduces its figures.

- **Repository:** https://github.com/aosses-tue/fluctuation-strength-TUe
- **Language:** MATLAB
- **Kind:** Research code (Code published with a study, a thesis or a student project, to run or adapt; not packaged as a library.)
- **Group:** legacy (Archived, or no commit for three years or more. Kept for reference. The code may follow an older edition and may not run with current software.)
- **Licence:** none
- **Latest release:** v1.0 (2019-12)
- **Last commit:** 2020-01-02 (inactive since 2020-01)
- **GitHub stars:** 1
- **Maintainers:** Alejandro Osses
- **AI assistance:** not stated
- **Paper:** Osses, A., García, R., & Kohlrausch, A. (2016). Modelling the sensation of fluctuation strength. *Proceedings of Meetings on Acoustics*, 28, 050005. https://doi.org/10.1121/2.0000410
- **How to cite:** Cite the paper above. Name the version or commit you used.
- **Entry checked:** 2026-10-06

## What it implements

| Metric | Edition | Functions | Status | Validation (as stated) | Notes |
|---|---|---|---|---|---|
| [Fluctuation strength (Osses et al.)](https://zhenxianli.github.io/LISQM/metrics/fluctuation-strength-osses.html) | [Osses et al. (2016)](https://doi.org/10.1121/2.0000410) (since 1.0) | `FluctuationStrength_TUe` | available | standard or paper data | — |

## How it was validated

As reported by the project; LISQM has not run the code. Two implementations that agree can still share the same error.

- [Fluctuation strength (Osses et al.)](https://zhenxianli.github.io/LISQM/metrics/fluctuation-strength-osses.html), Osses et al. (2016): standard or paper data
  - `demos/demo_osses2016a.m` reproduces the figures of the paper with the included stimuli (AM and FM tones, AM noise and excerpts of real sounds).

## Notes

- The header says the algorithm was "adapted from the Roughness model" and programmed by Alejandro Osses and Rodrigo García at TU/e, 2014–2016.
- The model is also documented in Osses Vecchi (2018), PhD thesis, TU Eindhoven (Chapter 2 and Appendix B), linked from the README.
- Version 1.0 is a git tag of 2019-12-31; the code was optimised after the tag, on 2020-01-02.

## Before you rely on it

- No licence file, so reuse is not permitted by default.

## Sources

- https://github.com/aosses-tue/fluctuation-strength-TUe
- https://github.com/aosses-tue/fluctuation-strength-TUe/blob/master/README.md
- https://github.com/aosses-tue/fluctuation-strength-TUe/blob/master/FluctuationStrength_TUe.m
- https://doi.org/10.1121/2.0000410
- https://research.tue.nl/files/103868563/20180919_Osses_Vecchi.pdf