Martin
Gardiner in Improbable
Research
Given the current
interest in the implications of automated computer analysis of voice
recordings, say for example telephone calls, it’s perhaps not surprising that
some might have thought about disguising their voice to (try to) avoid
recognition and/or obfuscate the content.
But those who work professionally in
the voice-recognition field have been investigating such nefarious methodology
for more than a decade. In a now-classic paper on the subject published as long
ago as 2000, authors professor Robert D. Rodman and Michael S. Powell of the
Department of Computer Science at North Carolina State University, US, listed
more than 20 viable types of voice disguise techniques.
They include, for example:
● Putting on a foreign
accent
● Deliberately lisping
● Tongue holding (whilst speaking)
● and so-called ‘Pipe-smoker’ speech (talking whilst biting a hard object)
● Deliberately lisping
● Tongue holding (whilst speaking)
● and so-called ‘Pipe-smoker’ speech (talking whilst biting a hard object)
A video example of which
is available here. Compare and contrast various phrases with and without pipe.
See: ‘Computer Recognition of Speakers Who Disguise Their Voice’ in : Proceedings
of the International Conference on Signal Processing Applications &
Technology 2000 (ICSPAT2000),
October, 2000.
Note: The photo above shows the 12018 ‘voice changer’ available
from Berwick Industrial Co. Ltd. Hong Kong.
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