Sound Cleaner: Real-time noise reduction software

Overview

Sound Cleaner is a professional real-time noise suppression and speech enhancement software solution that uniquely combines all state of the art filtering algorithms and speech enhancement tools in one product. Through the filtering workflow, each module can be easily activated and combined with others so that all the changes in the audio file can be intelligibly reviewed and assessed on-the-fly.

From a new user to a professional audio expert, Sound Cleaner provides the tools to allow a full spectrum of noise filtering and sound enhancing tasks. Enhancement and filtering is a fundamental operation of any law enforcement or private agency which handles any type of audio evidence or ideal. Whether the need is to eliminate interference to improve voice clarity or bring out background noises for better analysis, Sound Cleaner is the perfect solution.

A great majority of audio samples received for review will either require or benefit from noise filtering, particularly those recorded in uncontrolled environments. The ability to perform these tasks in-house offers significant advantages both financially in not having to enlist the services of a costly third party audio expert as well as operationally in reducing the time required to process the audio. A single case can potentially provide a complete return on investment on the Sound Cleaner application.

The program operates like a mosaic, which means a user may design a scheme of signal processing, combining any of the provided modules (processes) in a desired sequence beginning with the sound input. Each process included in the scheme receives a signal from the previous process, applies its specific algorithm and then passes the processed signal to the next module in the chain. The number of modules consequently used in a single scheme is limited only by capabilities of the PC or workstation hardware.

Features

Highlights

• Noise suppression and speech enhancement in low quality recordings
• Text decoding (transcription) of noisy recordings
• Audio pre-processing for identification
• Noise suppression while getting field data
• Efficient suppression of all types of noises and distortions
• Adaptive algorithms of filtering
• Filters can be combined to process the noisy recordings simultaneously

Features

• Saving of results in *.wav format
• Real-time noise suppression, changing of filter settings without playback stop
• Automatic report on sound processing for expert’s conclusion
• Preset filtering schemes for typical noises
• Saving of filters parameters and schemes for future use
• Low quality recordings processing for additional ID analysis: “weak” formants enhancement
• DirectX support
• Pseudo stereo

Technical characteristics

• 2 adaptive filters of broadband noises
• Parametric equalizer
• Harmonic filter
• Adaptive inverse filter
• Amplifier
• Adaptive filter for tonal noises
• Impulse noises filter
• Dynamic filter (weak signal amplifying/weakening, strong signal weakening)
• Anti-reverberation filter
• Stereo signal filtering by reference channel
• Practical recommendations for noise suppression and text decoding.