University of Hertfordshire

From the same journal

By the same authors

A test of the effectiveness of speaker verification for differentiating between identical twins.

Research output: Contribution to journalArticlepeer-review


  • 903145

    Accepted author manuscript, 210 KB, PDF document

View graph of relations
Original languageEnglish
Pages (from-to)182-186
JournalScience and Justice
Publication statusPublished - 2008


This paper presents investigations into the ability of speaker verification technology to discriminate between identical twins. It is shown that whilst, in general, the genetic and non-genetic characteristics of voice are both of value to speaker verification capabilities, it is the latter which is highly beneficial in the separation of the speech of identical twins. It is further demonstrated that through the use of unconstrained cohort normalisation as a complementary means for the exploitation of such voice characteristics, the verification reliability can be considerably enhanced for both identical twins and unrelated speakers. Experiments were conducted using a bespoke clean-speech database consisting of utterances from forty nine identical twin pairs. The paper details the problem in speaker verification posed by identical twins, discusses the experimental investigations and provides an analysis of the results.


Original article can be found at : Copyright Elsevier B.V. and the Forensic Society

ID: 302092