What is examined

Forensic audio examination of speakers' speech: the verbatim content of a conversation, number of participants, suitability of the audio recording and samples for identification, and comparison of voice and speech.

The examination uses the submitted audio and video materials, storage media, recording devices, voice and speech samples, case documents and the questions posed.

Possible questions

whether the recording is suitable for the task posed;
whether there are signs of alteration or discontinuity;
the content of the relevant recording segment;
which audio or visual features are relevant to the case;
whether the materials and samples provided are sufficient;
whether the findings of a previous examination are substantiated.

What to provide

source files without forwarding through messaging apps, if possible;
the storage medium or recording device;
the start and end times of the relevant segments;
voice and speech samples for identification questions;
an investigative order, a court ruling or draft questions;
information about the recording conditions.

Pricing

from RUB 80,000. The exact cost depends on the recording's duration, material quality, number of segments and questions, the need for a report review and urgency.

Examination of voice and spoken speech depends on the quality, duration and comparability of recordings. Identifying the speaker is distinguished from transcribing words and linguistically analysing their meaning.

Subject of examination

The disputed speech recording
Reliable comparison recordings
Recording conditions, communication channels and file transformations

Sample questions for the expert

Are the recordings suitable for a comparative examination of the speaker?
Are there comparable voice and speech features?
Which differences are attributable to the channel, noise or speaking conditions?
What are the limits of a possible conclusion about the speaker?

The final questions are formulated according to the objects and circumstances of the particular task.

What to prepare

Source files without repeated transcoding
Comparison recordings with reliable provenance
Information about devices, the channel and recording conditions
The chronology of receipt and specific questions

How the examination is conducted

Audibility, speech material and comparability of conditions are assessed. The features and methods used must be described in the examination rather than replaced by a subjective impression of voice similarity.

Scope and limitations

Short, distorted or heavily noise-contaminated material may be unsuitable. A similar voice cannot automatically establish the account holder or the file's sender.

What the deliverable records

The conclusions state the suitability of the recordings, the features compared and the permissible degree of certainty of the answer.

Cost and terms

from RUB 80,000. The exact cost depends on the recording's duration, material quality, number of segments and questions, the need for a report review and urgency.

Inquiry

Send a recording or describe the task

You may send an audio or video file, a link, an investigative order, a court ruling, draft questions or an existing report for review.

voice and spoken speech;
the acoustic environment and audio recording traces;
video images and video recording traces;
editing, continuity, the recording device;
report review and questions for court.

Type of examinationYour nameContact phone number or email *Briefly describe the task *Attach materials

Up to 10 files of 10 MB each, up to 15 MB in total. Preserve source recordings and metadata without resaving. Arrange the transfer of large files and storage media separately by email.

I give consent to the processing of my personal data for the purpose of considering and responding to my enquiry.

How data is processed: Personal Data Processing Policy. Attach only materials relevant to the examination; redact unnecessary data about other people.

Leave blank

For a preliminary assessment, please specify the file format, recording source, start and end times, recording device, and availability of the source file and voice samples.

Attachments: up to 10 files of up to 10 MB each, with a maximum combined size of 15 MB. If a file is rejected, the enquiry is not sent.