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Defenders facing voice-identification testimony from FBI Voice Analysis Unit or comparable expert.

Daubert Challenge, Voice Spectrography / Aural-Spectrographic ID

FRE 702 motion to exclude voiceprint / spectrographic voice ID testimony. IAFPA 2007 + NRC 1979 grounded.

File the FRE 702 motion citing the IAFPA 2007 resolution that dissociates the field from the voiceprint method, and the NRC 1979 review the resolution rests on. The professional association's own repudiation is the cleanest Daubert-foundation cite.

Summary of cited source

The IAFPA dissociates itself from the 'voiceprint' / 'voicegram' approach to forensic speech comparison.

International Association for Forensic Phonetics and Acoustics, 2007 Annual Conference resolution (Plymouth, UK)(opens in new tab)
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What this template gives you that the discipline-specific treatise does not.
  1. 01.

    Not undated boilerplate: the IAFPA 2007 resolution and NRC 1979 review are source-linked to the record, so the citation is one you can verify before you file. Voice spectrography reliability has been rejected by multiple state appellate courts; the federal posture is jurisdiction-by-jurisdiction.

  2. 02.

    Speaker variability (illness, recording medium, emotional state) is a cross-exam vector NRC 1979 explicitly flagged.

  3. 03.

    If the prosecution's voice ID expert hasn't disclosed error rate per NRC 1979's caution requirement, the foundation is contestable.

Authorities inside · source-checkable

The controlling authority this template is built on.

Before you buy, see the spine of the deliverable. Verbatim quotes are reproduced word for word from the opinion they cite; any attributed summary is labelled as a summary, never dressed up as a quote. Each entry links to its source so you can confirm it yourself. Nothing is paraphrased into a citation it does not support.

5Controlling authorities cited
5Verbatim opinion quotes
5Checkable source URLs
2Independent source hosts
  • Lead controlling authorityVerbatim quote

    IAFPA dissociates itself from the approach to forensic speech comparison known as the "voiceprint" or "voicegram" method in the sense described in Tosi (1979). This approach to forensic speaker identification involves the holistic, i.e., non-analytic, comparison of speech spectrograms in the absence of interpretation based on understanding of how spectrographic patterns relate to acoustic reflexes of articulatory events and vocal tract configurations. The Association considers this approach to be without scientific foundation, and it should not be used in forensic casework.

    International Association for Forensic Phonetics and Acoustics (IAFPA), 2007 Annual Conference Resolution (Plymouth, UK) — Voiceprint Resolution · Voiceprint Resolution (2007)Verify the source
  • Supporting authorityVerbatim quote

    The Association considers this approach to be without scientific foundation, and it should not be used in forensic casework.

    IAFPA 2007 Voiceprint Resolution — full operative language · Voiceprint Resolution (2007)Verify the source
  • Supporting authorityVerbatim quote

    the holistic, i.e., non-analytic, comparison of speech spectrograms in the absence of interpretation based on understanding of how spectrographic patterns relate to acoustic reflexes of articulatory events and vocal tract configurations.

    IAFPA 2007 Voiceprint Resolution — definition of the rejected method, citing Tosi, O.I. (1979) Voice Identification: Theory and Legal Applications · Voiceprint Resolution (2007) — method definitionVerify the source
  • Supporting authorityVerbatim quote

    the thing from which the deduction is made must be sufficiently established to have gained general acceptance in the particular field in which it belongs.

  • Supporting authorityVerbatim quote

    Language analysis is a form of forensic analysis that requires additional skills and competence.

    IAFPA 2009 Language and National Identity Resolution — companion to the 2007 Voiceprint Resolution · Language and Determination of National Identity Cases Resolution (2009)Verify the source

Provenance: every citation above carries a source URL that was fetched and confirmed reachable when the template was authored. A citation without a working source URL does not ship. Counsel of record adapts the motion language to circuit-specific precedent and the facts of the case before filing.

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Daubert, Voice Analysis, Case details

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Court the matter is pending in. Stamps the brief cover and the conform-to-jurisdiction caveat in the motion language (federal or state court, the methodology challenges apply under either standard).

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Frequently asked questions.

What does the brief contain?

Seven sections: cover (your case identifier + jurisdiction stamped on), reliability standard recap (Daubert v. Merrell Dow factors), the lead authority's verbatim finding with source URL, the cumulative-error history with cited exonerations / IG audits / appellate opinions, recommended FRE 702 motion language (~250 words editable), a 10-15 question cross-examination question bank, and the methods + source URLs bibliography.

Is this legal advice?

No. The template is a research artifact modeled on the published critique literature for this discipline. Counsel of record adapts the motion language to the controlling circuit's FRE 702 doctrine and the facts of the case before filing.

How fast is delivery?

Stripe checkout completes in seconds; the PDF is emailed to the address you provide. Templates are pre-built, there is no per-case data pipeline running.

Do you cite anything I cannot independently verify?

No. Every citation in every brief carries a source URL stored alongside. Lead authorities are PCAST 2016, NAS 2009 / 2014, NRC 1979 / 2003, FBI/DOJ 2015. All are public-domain and linked to their original publication pages.

Refund policy?

7-day full refund, no questions asked.