We help companies having sound quality as a key parameter in their products or technology, to learn about current state-of-the-art perceptual evaluation methods and practices.

Target audience 

The training courses or workshops are intended for managers, stakeholders, specialists and researchers for whom audio quality is important. A course or workshop is relevant if you are planning to run listening tests to make your product better, preparing marketing claims substantiation or seeking to better understand the value of perceptual evaluation. The course format is typically a combination of lectures and practical demonstrations. 

Outcome 

During the course or workshop you will see a wide range of perceptual evaluation methods applied to audio. You will gain an understanding of what can be achieved through these methods and correct usage. You will become comfortable with the process of designing listening tests, collecting data, as well as performing basic statistical analyses. All elements contributing in maximizing the signal to noise ratio in your measurements. 

Listening test practices

  • Introduction to listening test practices 
  • Experimental considerations 
  • Research question and hypothesis 
  • Experimental variables 
  • Assessors and tech consideration 

Listening conditions and calibration

  • The role of a listening panel 
  • Assessor screening (normal hearing and hearing impaired) 
  • Assessor training 
  • Listener motivation and feedback 

Test methodologies 

  • Consumer approaches ITU-T & ITU-R
  • Descriptive analysis (attribute testing) 
  • Semantic space of audio 
  • Individual vocabulary profiling (IVP) 
  • Projective mapping 
  • Ideal profile method (IPM) 

Practical statistics 

  • Data screening 
  • Descriptive statistics 
  • Assessor performance 
  • Checking analysis assumption 
  • Explaining the structure of the data 
  • Analysis of variance 
  • Difference testing 
  • T-tests and post hoc tests