Get Clarity. · Voice ID & Speaker Identification
Who’s on the Recording? Forensic Voice Comparison.
Scientific voice comparison to determine if two recordings are the same person. Noise removal, individual voice separation, and acoustic detail comparison — vowels, pitch, and formants. AI voice detection is available.
Free 10-min intro call · No obligation · Chain of custody assessment
What We Do
Turn Unclear Evidence Into Case-Winning Exhibits
They deny it’s their voice on the recording. Or they claim it is, but the caller sounds completely different. Anonymous threats. Voicemails someone says they never left. AI voice clones getting convincingly good. The recording is everything — but whose voice is it?
Scientific Voice Comparison
Special forensic software compares two voice recordings to determine if they are the same person. Spectrographic analysis of vowels, pitch, cadence, and acoustic signatures — frame-by-frame.
Audio Signal Enhancement
Enhance the voice audio signal before comparison. Remove noise, separate overlapping voices, isolate the target voice from background chatter.
Detailed Voice Feature Analysis
Compare details of the human voice — vowels, pitch, formants, resonance. Documented methodology that produces defensible, court-admissible conclusions with stated confidence.
AI Voice Clone Detection
Identify synthetic audio: voice cloning, deepfake voices, and AI-generated speech. Increasingly critical as voice synthesis tools become accessible to the public.
Critical Listening Comparison
Determine with documented confidence whether a questioned voice matches a known speaker. Confidence levels: probable match, possible match, inconclusive, exclusion.
Court-Admissible Reports & Testimony
Every analysis delivered with methodology documentation, confidence rating, and forensic protocol compliance. Expert testimony available for state, federal, family law courts.
Schedule Your Free Advisory Call With Our Case Manager
No obligation · Evidence review + admissibility path
Court-Approved Credentials
Why Attorneys Trust NCAVF
NCAVF’s voice identification work has supported criminal defense, harassment cases, corporate fraud investigations, and family law matters. Our forensic methodology and testimony have been accepted in courts across the US. Our voice comparison experts have been interviewed by national media.
Your Questions, Answered
Common Questions From Attorneys
How much recording do you need for a voice ID?
Ideally 30 seconds or more of clear speech for both the questioned and known samples — but we’ve worked with less. Quality matters more than quantity. The initial evaluation helps us to determine what is possible and what is not possible with your evidence.
Can voice clones be detected?
Often yes, especially with current-generation AI tools. Synthetic voices leave acoustic fingerprints — unnatural breath patterns, formant inconsistencies, and metadata traces. Detection is a moving target as AI improves; we stay current with the research.
Is voice identification as reliable as fingerprinting?
No forensic voice comparison methodology claims the certainty of DNA or fingerprints. But spectrographic voice analysis, properly conducted, provides meaningful probative evidence with documented confidence levels — which is what courts require.
Will the analysis hold up on cross-examination?
Yes. Every report documents methodology, sample quality, limitations, and confidence levels. Our experts have testified in state and federal court and withstood opposing-expert cross-examination.
What does voice identification cost?
Depends on sample length, quality, and whether testimony is required. Speak with our case manager to discuss your specific evidence and the forensic work necessary.
Free 10-Min Advisory Call • No Obligation • Chain of Custody Expertise
Schedule Your Free Advisory Call With Our Case Manager Our case manager will have an initial discussion about your video evidence and give you options for the best way to proceed
Schedule Your Free Advisory Call With Our Case Manager Our case manager will have an initial discussion about your video evidence and give you options for the best way to proceed
Limited Capacity
We Take a Limited Number of New Cases Each Month
To give every case the attention it deserves — evidence review, expert analysis, court-ready exhibits, and testimony prep — we cap new engagements.
Limited to 20 new case consultations per month
If your trial date is approaching, don’t wait. Most forensic clarification and analysis requires 2–3 weeks lead time for court-ready reports and expert testimony prep.
Book My Free Call With NCAVF’s Case Manager
Get Clarity
Turn Evidence Into Verdicts
Book your free 10-minute call with our senior case manager. We’ll review your evidence, assess the admissibility path, and give you an honest scope — before you commit to anything.
- Free 10-minute call with our senior case manager
- Honest evaluation of how we can best proceed with your evidence
- Court-approved experts in state and federal courts across the country
- Chain of custody documented and maintained from first contact
- No obligation — we tell you honestly if we’re not the right fit
DO NOT send evidence before speaking to one of our case managers.
Verdicts and Testimony That Hold Up Under Cross
“Your work… was spectacular. You saved an innocent man from prison.”
Aaron J. Brockler, Esq.
Cleveland, Ohio
“NCAVF’s assistance was absolutely critical to the successful outcome… they were an indispensable member of the defense team.”
William Hadden
Attorney
Featured on CNN, Fox News, MSNBC, ABC, USA Today · Case outcomes include $21.5M verdict (Duda), not-guilty in Kelly Thomas, case dismissed in Hokoana
Schedule Your Free Advisory Call With Our Case Manager