Subjective and objective assessment of the listening quality of customer support waiting loops

This paper assesses the perceived listening quality of customer support waiting loops using both a subjective experiment as well as an objective perceptual assessment with POLQA (ITU-T Rec. P.863) and VISQOL. A modified version of the methodology defined in the ITU-T Rec. P.835 was derived and used in this paper to subjectively assess the...

Quantifying sound quality in loudspeaker reproduction

We present PREQUEL: Perceptual Reproduction Quality Evaluation for Loudspeakers. Instead of quantifying the loudspeaker system itself, PREQUEL quantifies the overall loudspeakers' perceived sound quality by assessing their acoustic output using a set of music signals. This approach introduces a major problem: subjects cannot be provided with an...

Subjective and Objective Assessment of Perceived Audio Quality of Current Digital Audio Broadcasting Systems and Web-Casting Applications

This paper investigates the impact of different audio codecs typically deployed in current digital audio broadcasting (DAB) systems and web-casting applications, which represent a main source of quality impairment in these systems and applications, on the quality perceived by the end user. Both subjective and objective assessments are used. Two...

Experimental example of the pseudo-forces method used in characterisation of a structure-borne sound source

In the analysis of machinery noise the aspect of sound source characterisation is of importance. Unlike for airborne sources, no widely applicable methods are available yet for structure-borne sound sources. In previous work a 'pseudo-forces' methodology was suggested. In this approach fictitious forces on the outer surface replace the internal...