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3rd Clarity Prediction Challenge (CPC-3)
Launch: March 17th, 2025; Submission: 31st July, 2025
Workshop: August 22nd, 2025, an INTERSPEECH satellite workshop
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Dear colleague,
It gives us great pleasure to announce the launch of the 3rd Clarity Speech Separation and Recognition Challenge (CPC3).
The Challenge
To improve hearing enhancement technologies, such as hearing aids and hearable devices, we need reliable methods for automatically assessing the speech intelligibility of audio signals.
In recent years, we have organised the CPC1 and CPC2 Challenges to promote the development of such prediction systems. We are now launching the third round of this challenge, building on previous efforts by incorporating a more extensive and diverse set of listener data for training and evaluation.
Hearing aid outputs: Audio produced by various simulated hearing aids while processing speech in noisy environments.
Clean speech reference signals
Listening Test Results: This includes transcripts and intelligibility scores from tests in which hearing-impaired listeners were asked to repeat what they heard.
Listener Characteristics: Information regarding the severity of hearing impairment for each listener.
Software Tools: Tools include a baseline system based on HASPI scores.
For further details, including how to obtain the data and how to register to enter, please see https://claritychallenge.org/docs/cpc3/cpc3_intro
The Workshop
The results of the new challenge will be showcased at an ISCA workshop satellite event of Interspeech 2025 in Rotterdam on 22nd August 2025.
For further details, see https://claritychallenge.org/clarity2025-workshop/
Important Dates
17th March 2025: Launch of challenge, the release of the training data set (i.e. signals and paired intelligibility scores).
24th March 2025: Release of the development data.
14th April 2025: Opening of the development data leaderboard.
1st July 2025: Release of evaluation data.
31st July 2025: Submission deadline. All entrants must have submitted their predictions plus a draft of their technical report.
Scores will be returned to entrants within 24 hours of submission.
22nd August 2025: Clarity 2025 workshop, @Interspeech, Rotterdam
For further information
To keep up to date, please join our Clarity Challenge Google group. If you have questions, please contact us directly using the contact details found here.
Organisers
Michael A. Akeroyd, University of Nottingham
Jon Barker, University of Sheffield
Trevor J. Cox, University of Salford
John F. Culling, Cardiff University
Jennifer Firth, University of Nottingham
Simone Graetzer, University of Salford
Graham Naylor, University of Nottingham
Funded by the Engineering and Physical Sciences Research Council (EPSRC), UK
Supported by RNID (formerly Action on Hearing Loss), Hearing Industry Research Consortium, Amazon TTS Research
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