Forensic examination and analysis of tape recordings and text evidence, including speaker identification, tape authentication and enhancement. Offering services in the United Kingdom and internationally.

Accoustical consulting and audio-visual system design service, based in California.

Specializing in acoustics and recorded evidence, including speaker identification, and tape authentication, enhancement and transcription. Based in Gainesville, Florida.

Florida consultant, offering computer analysis, ambient noise reduction, and voice identification, for litigation in state and federal courts.

Audio-video processing laboratory, based in New York, with digital capacities signal processing and voice identification.

Expert services for audiotape authentication, voice identification and elimination, acoustic identification and transcription of noisy recordings.

Consultant forensic scientists and expert witnesses, based in the United Kingdom.

Audio forensic services consisting of recording enhancement, transcription and authentication. Based in Maryland.