Sound leakage protection method and system based on sound masking principle

Abstract

The invention provides a sound leakage protection system based on the sound masking principle. The system comprises a sound monitoring unit, a sound disturbing unit and a center control management unit. The invention further provides a sound leakage protection method based on the sound masking principle. The method comprises steps as follows: the sound monitoring unit is adopted to collect a sound signal, and A-weighting sound pressure level intensity is obtained; whether the sound signal is a voice signal is judged, if the sound signal is the voice signal and the A-weighting sound pressure level intensity exceeds a preset threshold value in a period, a warning signal is emitted; the center control management unit performs analysis and feature extraction on the voice signal, generates a disturbing signal and sends the disturbing signal to the sound disturbing unit; the sound disturbing unit adopts the disturbing signal to perform sound disturbing on each area. According to the method and the system, a masking signal processed in real time has higher relevance with a target voice, the masking effect is better, and general privacy can be protected better.

Description

technical field [0001] The invention relates to the technical field of voice signal processing, in particular to a sound leakage protection method and system based on the sound masking principle. Background technique [0002] As an important carrier of people's information exchange and transmission, speech sound has the most occasions and carries the most abundant information. The leakage of sensitive voice information will cause the destruction of language privacy. When people talk in places such as rooms, a large amount of sound information is generated. The conditions and safety of indoor facilities are directly related to the safety of speech content. In order to improve speech privacy and security, acoustic information leakage protection is required. [0003] As a part of indoor facilities, the sound leakage protection system can effectively protect the sound information generated, stored and processed in people's daily life. The existing sound leakage protection sy...

AI Technical Summary

Problems solved by technology

However, the sound jammer in the existing system only includes the voice jammer, not the vibration jammer, so the existing system cannot prevent laser eavesdropping, pipeline vibration eavesdropping and wall vibration eavesdropping, etc., and the sound signal will still leak

Moreover, the existing system uses traditional white noise or pink noise masking signal, but since the masking signal has a low correlation with the masked sound source signal, it is easy to restore the masked sound source signal through some simple processing

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