Long-Distance Laser Eavesdropping System (Laser Audio Vibration Detector) - Application Introduction in Criminal Investigation Technology and Forensic Identification
The Long-Distance Laser Eavesdropping System (Laser Audio Vibration Detector) is a specialized non-contact concealed audio evidence collection equipment in the fields of criminal investigation technology and forensic identification. Based on the principle of laser interferometry and integrated with a number of core technologies, it can detect weak vibrations of target media within 300 meters (up to 500 meters in extreme conditions) and restore clear audio, realizing non-contact and concealed acquisition of sound information. It solves the pain point that traditional sound pickup methods cannot collect evidence at long distances without interference, and provides legal, accurate and traceable audio evidence support for criminal investigation, on-site sound restoration and forensic identification.
The core performance of the equipment is accurately adapted to the needs of criminal investigation and forensic identification: high-sensitivity detection can capture nanoscale vibrations, and AI noise reduction technology ensures that the speech intelligibility rate is ≥90% in noisy environments, guaranteeing the clarity of audio evidence; multi-medium adaptation and window-penetrating eavesdropping capabilities can obtain audio through various materials such as glass and wood, adapting to crime scenes that are inconvenient to approach; the concealed infrared laser design, combined with quick erection and remote display and control functions, can complete evidence collection without exposing investigators, ensuring the legality and compliance of the evidence collection process; synchronous audio and video recording and storage form a complete electronic evidence chain, facilitating forensic identification review and court presentation.
Combined with criminal investigation practice and forensic identification cases, its application value is prominent: Case 1, in a case of concealed gathering of an underworld gang, investigators used the system to secretly eavesdrop on and record the involved conversations of gang members through the glass windows of the involved house 200 meters away, restoring the details of the criminal conspiracy. The recorded clear audio, as key evidence, provided direct basis for case characterization and determination of the criminal liability of the involved personnel in forensic identification. Case 2, in the investigation of a homicide case in a confined space where direct entry was impossible, the system was used to detect the vibrations of the on-site doors and windows, restore the sound trajectory at the time of the incident, assist in inferring the injury process and the number of perpetrators, and provide important audio evidence for forensic identification and crime process reconstruction.
In summary, the equipment is suitable for scenarios such as concealed criminal investigation intelligence acquisition, complex on-site sound restoration, and indirect detection of special media. It can realize long-distance, non-contact and concealed audio evidence collection, standardize the evidence collection process, improve the quality of audio evidence, provide objective and accurate technical support for forensic identification, improve the evidence chain, and assist in the fair trial of cases. It is an indispensable professional audio evidence collection equipment in the fields of criminal investigation technology and forensic identification.