Download Forensic speaker identification by Phil Rose PDF

By Phil Rose

A voice is way greater than only a string of phrases. Voices, in contrast to fingerprints, are inherently complicated. They sign loads of info as well as the meant message: the audio system' intercourse, for instance, or their emotional country, or age. even though facts from DNA research grabs the headlines, DNA cannot speak. It cannot be recorded making plans, carrying-out or confessing to a criminal offense. It cannot be so it appears at once incriminating. possibly it truly is those positive factors that give a contribution to the curiosity and value of Forensic Speaker identity (FSI)

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An acoustic analysis on its own is inadequate because, as already explained, without some kind of control from an auditory analysis indicating what is comparable, © 2002 Taylor & Francis samples can differ acoustically to any extent. Furthermore studies have shown that it is possible for two speakers to be effectively indistinguishable acoustically because of near identity in vocal tract dimensions, and yet still show linguistic differences that would be obvious to the trained ear. Nolan and Oh’s 1996 paper ‘Identical twins, different voices’ reports, for example, how identical twins who could be assumed to have the same vocal tract dimensions and who differed minimally in general acoustic output, nevertheless differed consistently in the type of r sound they used.

Each label, with its associated symbol, is a reflection of an underlying network of theoretical concepts and assumptions. A complex analytical framework underlies the description of speech sounds. Laver (1994: 4) It is important to draw attention to the fact that there is a complex analytical framework underlying the description of speech, because non-linguists often do not understand that speech is the realisation of structure (Labov and Harris 1994: 291), and very complicated structure at that.

Acoustic vs. auditory parameters Acoustic parameters are self-explanatory, and comparing voice samples with respect to their acoustic properties extracted by computer is perhaps what first comes to mind when one thinks of forensic speaker identification. However, it should not be forgotten that it is also possible to describe and compare voices with respect to their auditory features: how the voices and speech sounds sound to an observer trained in recognising and transcribing auditory features.

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