(Italics inserted by me)
WS-ers, the more I think about this (and especially the many posts discussing DNA possibilities:
Does LE have it? What have they learned from it? When will we find out?, etc., etc.), the more something I read maybe 10 or more years ago pops to the front of my mind. Not about DNA, per se, but about..."voice fingerprints". (I know, sounds a bit off-the-wall, right? But this concept first began to be discussed -- perhaps by some audio engineers at first, then later by the FBI -- over 10 years ago.) So I went digging around a bit, though had a tough time finding much (short of a few super-techy things that most of us may not understand). Here are a few tidbits -- hopefully someone else in the WS community can tell us more about it (the present-day accuracy levels, etc.). By the way, 10-15 years ago (when voice "fingerprints" were initially hypothesized), what we now know of as "voice actuation" (used by certain large corporations for security purposes) was in its infancy... There was no "Alexa" back then who would "memorize" a person's speech patterns/audio waves, etc. But...
now?
Everyone's heard of "Alexa". (I mention this regarding present-day applications.)
So many of us have listened, multiple times, to the "Down the hill...guys" audio clip. While I understand that the audio is fuzzy quality, I wonder...what are the possibilities that pinning down BG's "voice fingerprint" would bring LE even closer to BG's actual identity? Would love to hear from others on this topic.
Here are a few articles (I'd love to read even *more* up-to-date research about this technology and applications to forensic research, as well as more of the details regarding
how voice audio that has been captured during a crime is used to narrow down a POI):
Voice 'Fingerprints' Change Crime-Solving (note: this story is from
2008 -- not exactly recent, but at least it's a start). Here's a quick part of it:
Running an audio clip of someone's voice through the system, called FASR, prompts bright squiggly lines to rise and fall. Each voice is quite distinct. While the pattern isn't as definitive as DNA, the FBI says, FASR gets pretty close.
Here's one other article (more on biometrics than specifically about "voice fingerprints"):
Top Five Biometrics: Face, Fingerprint, Iris, Palm and Voice
Here's a short part of this second article:
Forensic applications commonly perform a speaker identification process initially to create a list of best matches. Then a series of verification processes are done to determine a conclusive match. In these systems, the emphasis is on the vocal features that produce speech and not on the sound or pronunciation of speech.