  The performance of a speaker recognition system decreases when the speaker is
under stress or emotion. In this paper we explore and identify a mechanism that
enables use of inherent stress-in-speech or speaking style information present
in speech of a person as additional cues for speaker recognition. We quantify
the the inherent stress present in the speech of a speaker mainly using 3
features, namely, pitch, amplitude and duration (together called PAD) We
experimentally observe that the PAD vectors of similar phones in different
words of a speaker are close to each other in the three dimensional (PAD) space
confirming that the way a speaker stresses different syllables in their speech
is unique to them, thus we propose the use of PAD based speaking style of a
speaker as an additional feature for speaker recognition applications.
