Before revision: Forensic speechreading and the law In the UK, a landmark case and appeal (R. v Luttrell et al., 2004) established the admissibility of lipreading evidence.original case notes; URL appeal court decision; URL However, the appeal court also required that the judge should issue a special warning as to its risks and limitations.updated ruling in relation to expert witness evidence; Mary Luckham 'Forensic URL While lipread speech can carry useful speech information, it is inherently less accurate than (clearly) heard speech because many distinctive features of speech are produced by actions of the tongue within the oral cavity and are not visible.
After revision: The law In the UK, a landmark case and appeal (R. v Luttrell et al., 2004) established the admissibility of lipreading evidence.original case notes; URL appeal court decision; URL However, the appeal court also required that the judge should issue a special warning as to its risks and limitations.updated ruling in relation to expert witness evidence; Mary Luckham 'Forensic URL While lipread speech can carry useful speech information, it is inherently less accurate than (clearly) heard speech because many distinctive features of speech are produced by actions of the tongue within the oral cavity and are not visible.