IAFPA
Definition
International Association for Forensic Phonetics and Acoustics: the primary professional body for forensic phoneticians and audio analysts, which publishes guidelines on speaker comparison methodology, reporting standards, and competency requirements.
- Field
- Forensic phonetics and acoustics
- Scope
- Speaker comparison, audio authenticity, transcription
- Output
- Methodology and reporting guidelines for members
- Membership basis
- Practising forensic phoneticians and acoustic analysts
Common questions
Does IAFPA certify individual examiners?+
IAFPA sets professional expectations and a code of conduct for its members rather than running a formal certification exam. Courts and labs treat IAFPA membership and adherence to its guidelines as one indicator of competence, alongside lab accreditation and case-specific validation.
How does IAFPA guidance affect casework?+
Its published position statements shape how speaker comparison reports are structured, including the use of likelihood-ratio frameworks and explicit statements of method limitations, which examiners cite when their reports face cross-examination.
Related terms
- Forensic Speaker Comparison
- A systematic examination comparing acoustic and phonetic features of a questioned voice recording against known reference recordings of a named individual, expressed...
- Formant Frequencies
- Resonance frequencies of the vocal tract that shape vowel quality. F1 and F2 (the first and second formants) are the most informative...
- I-Vector / X-Vector
- Fixed-length mathematical representations of a speech utterance used in automatic speaker recognition. I-vectors are derived from Gaussian mixture model statistics; x-vectors are...
- Likelihood Ratio (LR)
- The ratio of two conditional probabilities: the probability of the observed evidence given the prosecution's hypothesis (same source), divided by the probability...
- PLDA (Probabilistic Linear Discriminant Analysis)
- A statistical back-end model used with i-vector and x-vector systems to compute a similarity score between two utterance representations, normalised for within-speaker...