Scope of the project

SQ metrics

The scope of the project is to implement the following first set of metrics:

	Reference	Validated	Available	Under dev.	To do
Loudness for steady signals (Zwicker method)	ISO.532-1:2017[1]	X	X
Loudness for non-stationary (Zwicker method)	ISO.532-1:2017[1]	X	X
Loudness for non-stationary (ECMA method)		X	X
Sharpness	DIN.45692:2009[2]	X	X
Roughness (Daniel and Weber)	Daniel and Weber[3]	X	X
Roughness (ECMA method)				X
Fluctuation Strength	To be defined				X
Tonality (Hearing model)	ECMA.74:2019[4]			X
Speech Intelligibility index	ANSI.S3.5:2017[5]	X	X

As a second priority, the project could address the following metrics:

	Reference	Validated	Available	Under dev.	To do
Loudness for steady signals (Moore/Glasberg method)	ISO.532-2:2017[6]				X
Loudness for non-stationary (Moore/Glasberg method)	Moore and al.[7]				X
Sharpness (using Moore/Glasberg loudness)	Swift and Gee[8]				X
Tone-to-noise ratio / Prominence ratio (occupational noise, discrete tones)	ECMA.74:2019[4]		X
Tone-to-noise ratio (environmental noise, automatic tone detection)	DIN.45681:2005-03[9]				X
Audibility of tone in noise (Engineering method)	ISO.1996-2:2017[10]				X
Audibility of tone in noise (Survey method)	ISO.1996-2:2017[10]			X
Tone-to-noise ratio (environmental noise)					X

Other SQ tools

In parallel, tools for signal listening and manipulation will be developed. The objective is to be able to apply some modification to a signal (filtering, tone removal, etc.) and assess the impact on different SQ metrics. The integration of tools to define jury tests and analyze the results is also planned.

Of course, any other sound quality related implementation by anyone who wants to contribute is welcome.

References

[1] (1,2)

ISO.532-1:2017. Methods for calculating loudness, part 1 Zwicker Method. International Organization for Standardization, 2017. URL: https://www.iso.org/standard/63077.html.

[2]

DIN.45692:2009. Measurement technique for the simulation of the auditory sensation of sharpness. Deutsches Institut fur Normung, 2009. URL: https://www.normadoc.com/english/din-45692-2009-08.html?___from_store=french.

[3]

P. Daniel and R. Weber. Psychoacoustical roughness: implementation of an optimized model. Acta Acustica, Vol. 83: 113-123, 1997. URL: https://www.ingentaconnect.com/contentone/dav/aaua/1997/00000083/00000001/art00020.

[4] (1,2)

ECMA.74:2019. Measurement of airborne noise emitted by information technology and telecommunications equipment. European Computer Manufacturers Association, 2019. URL: https://ecma-international.org/wp-content/uploads/ECMA-74_17th_edition_december_2019.pdf.

[5]

ANSI.S3.5:2017. Methods for calculation of the Speech Intelligibility Index. American National Standards Institute, 2017. URL: https://webstore.ansi.org/standards/asa/ansiasas31997r2017.

[6]

ISO.532-2:2017. Methods for calculating loudness, part 2 Moore-Glasberg method. International Organization for Standardization, 2017. URL: https://www.iso.org/standard/63077.html.

[7]

B. C. J. Moore and al. A loudness model for time-varying sounds incorporating binaural inhibition. Sage journals, Trends in Hearing, 2016. URL: https://journals.sagepub.com/doi/10.1177/2331216516682698, doi:10.1177/2331216516682698.

[8]

S.Hales Swift and K. L. Gee. Extending sharpness calculation for an alternative loudness metric input. J. Acoust. Soc. Am.142 EL549., 2017. URL: https://pubs.aip.org/asa/jasa/article/142/6/EL549/695113/Extending-sharpness-calculation-for-an-alternative, doi:10.1121/1.5016193.

[9]

DIN.45681:2005-03. Acoustics - Determination of tonal components of noise and determination of a tone adjustment for the assessment of noise immissions. Deutsches Institut fur Normung, 2005. URL: https://www.normadoc.com/english/din-45681-2005-03.html?___from_store=french.

[10] (1,2)

ISO.1996-2:2017. Description, measurement and assessment of environmental noise Part 2: Determination of sound pressure levels. International Organization for Standardization, 2017. URL: https://www.iso.org/standard/59766.html.