First ISCA ITRW on Auditory Quality of Systems

April 23-25, 2003
Akademie Mont-Cenis, Germany

The Impact of Real Environments on Transmitted Speech Quality Judgments

Laetitia Gros, NoŽl Chateau, Sylvain Busson

Department of human interactions, France Telecom Research and Development, Lannion, France

This paper deals with the question of the validity of listening tests in laboratory, in the case of the time-varying speech quality characterizing mobile telephony. In order to measure the impact of real environments, especially those of real sound environments, speech quality judgments are collected in a field experimentation. This experimentation consisted both in a listening test and in a conversation-opinion one. It was carried out in two different places, a noisy one and a quiet one. Recordings both of sound environments and speech sequences heard by listeners allowed to reproduce them in laboratory. Therefore speech quality judgments were also collected in laboratory and compared with those collected in real environments. Results show a weak impact of the sound environment on quality judgments and validate the use of listening tests in laboratory.

Full Paper

Bibliographic reference.  Gros, Laetitia / Chateau, NoŽl / Busson, Sylvain (2003): "The impact of real environments on transmitted speech quality judgments", In AQS-2003, 45-50.