Name: IKAR Lab
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INTRODUCTION INTO FORENSIC AUDIO
Nowadays law enforcement and security other widely use open and covert sound recordings of speech
communications for cnme investigation or other secunty purposes. The records received by law enforcement
agencies turns into court evidences. A branch of forensic science called Audio Forensics (Audio Phonelics, Audio
Acoustics) processes such audio evidences.
Forensic audio is audio services for legal applications. Forensic audio breaks down into four main categories.
SPEECH ENHANCEMENT: Digital and analog processing to restore verbal clarity and make tapes easier to
understand in a courtroom situation.
SPEECH DECODING: Methods that can be used to decode noisy speech and convert It to a reasonably
accurate and complete written copy or transcript.
AUTHENTICITY: Aural, electronic and physical examination of an audio files to prove that 1t has not been
tampered with, altered, or otherwise changed from its original state. Another common authenticity challenge 1s to
determine whether a given recording was indeed made on a given machine.
VOICE IDENTIFICATION: Voice ID is the soence that attempts to determine whether the recorded voice
belongs to the susp1oous speaker or not. Voice ID 1s based on the theory that v0tce of each person 1s as unique as
fingerpnntsor DNA and depends on the individual features of speech production organs, the shape of vocal tract,
mouth cavity, pronunciation skills, regional accent etc.
Speech Technology Center (STC) is the world 's leading manufacturer of Audio Forensic Products.
STC employs 250 staff with more than 10% having a PhD, 5 audio forensic experts with more than 5 years of
STC Audio Forensic Achievements include:
2001-2002 Submarine "Kursk" tapes 1nvestigatlon. restoration of more than 120 hours of information.
2003 participation In the investigation of the terronst phone recordings at the Moscow Trade Center
Over 100 Identification cases for different languages.
Forensic Audio examinations for USA, Great Britain. Belgium. India, Columbia, Philippines and others.
The first prize in audio enhancement contest organized by AES (Audio Eng1neenng Sooety)
STC experts are members of Scientific Council of the Federal Forensic Expert Center of Russia, Russian
Federation Justice Department Expert Group. Audio Engineenng Sooety (AES), International Sooety of Air
Safety Investigators (ISASI), International Speech Communication Association (ISCA), Institute of Electncal and
Electronics Engineers (IEEE).
Conferences and Exhibitions European Network of Forensic Soence lnsbtutes Expert Working Group
Forensic Speech and Audio Analysis (ENFSI FSAAWG), International AsSOClation for Forensic Phonetics and
Acoustics (IAFPA), Intelligence Support Systems (ISS), Audio Eng1neenng Society (AES), CeBIT. SpeechTek,
Mdipol. lnterspeech. DSA, NATIA, Safety&Security Asia.
Expert audio analysis tool kit
Professional hardware and software set
for advanced audio/speech signal analysis
The unique software and hardware set for comprehensive forensic analysis of analog and digital records.
Analysis of audio information in specialized laboratories and forensic centers, research and educational institutions and
Tasks solved with IKAR Lab:
Authenticity analysis of analog or digital audio recordings
Audio equipment testing and 1denlification
Analysis of noises, diagnosis of the acoustic environment and recording conditions
Speech enhancement and audio restoration
Text transcription of low quality recordings
SIS 7 .x - sound analysis and editing software application
Sound Cleaner Premium - professional real-time noise suppression and speech enhancement software
EdiTracker - software module for authenticity analysis of audio recording
Transcriber Caesar - software for fast and
convenient speech transcnption
STC-H246 - external measunng inpu1/output
Professional microphone and headphones
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