# Roughness, DIN 38455

> 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/metrics/roughness-din-38455.html

**Quantity:** Roughness · **Unit:** asper · **Also known as:** DIN 38455, Rauigkeit, German roughness standard

DIN 38455:2024 is the first German standard for calculating roughness. Its text is not freely available, and the model it specifies could not be confirmed from public sources; a hearing-model roughness was proposed for DIN standardisation by Sottek & Becker (2019).

The current edition is DIN 38455:2024. No open-source implementation of it has been found.

## Editions and who implements them

| Date | Edition | Status | What changed | Implemented by |
|---|---|---|---|---|
| 2024-11 | [DIN 38455:2024](https://www.dinmedia.de/en/standard/din-38455/376186532) | current | First edition. | — |

## Implementations

No open-source implementation has been found yet. If you know one, please [open an issue](https://github.com/ZhenxianLi/LISQM/issues/new/choose).

**See also:** [Roughness from the Sottek Hearing Model (ECMA-418-2)](https://zhenxianli.github.io/LISQM/metrics/roughness-ecma-418-2.html), [Roughness, Daniel & Weber model](https://zhenxianli.github.io/LISQM/metrics/roughness-daniel-weber.html)

## References

1. DIN 38455:2024. Berechnung der Hörempfindung Rauigkeit (Calculation of the auditory sensation of roughness). https://www.dinmedia.de/en/standard/din-38455/376186532