SoundMaster ISA

Overview

- The application provides long-term audio analysis capabilities, based on semantic audio processing concepts

- Intelligent Sound Analysis brings real time audio-pattern recognition, visually resulting into an event detection markup timeline

- A dynamic audio-samples database is used as a pattern-storing matrix, which is configurable by users

- build-in audio semantic engine is capable of detecting audio events and patterns

Highlights

- Perfectly polished UI, delivering professional-grade user experience

- State-of-the-art implementations for Audio Feature Extraction, Temporal Feature Integration and Pattern Classification algorithms

- Calibrated using reference equipment

Main Features

- SoundMaster ISA: intelligent long-term audio monitoring

- SoundMaster RVA: octave-based RT60 measurements

- SoundMaster RTA: octave-based audio analysis

- SoundMaster SLM: professional sound level metering

- Advanced calibration and equalization support

- Sophisticated measurements management

Under the hood

- 44.1kHz/32bit raw audio recording

- 20Hz to 20kHz frequency response

- 90dB dynamic range, from 25dB to 115dB SPL[A]

- 1.4dB accuracy @25dB-115dB SPL[A]

- Low latency and processing-loss spectral analyzer

- Audio I/O latencies monitoring and compensation

- Build-in audio feature extraction engine for estimating temporal an spectral audio features

- MFCCs, ZCR, Spectral Centroid, Spread, Flatness, Crest Factor and Rolloff calculation

- 1NN and Euclidian-Distance based classifiers that enable audio pattern classification

- Mean, Variance and MeanVar temporal feature integration models for improving detection robustness

Audio Semantic Analysis

- Audio event detection and pattern matching annotation

- Option for capturing new audio samples and building a custom audio pattern library

- Option for choosing a subset of all available patterns on each measurement

- 1NN and Euclidian-Distance based algorithm as choices for classification

- Mean, Variance and MeanVar models as choices for temporal feature integration

- Audio event detection sensitivity adjustment

- Audio pattern matching sensitivity adjustment

- Audio features selection support

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Reverberation Time Measurements

- Octave-based RT60 measurement capability

- Interrupted noise method implementation through signal excitiation

- Build-in band-pass input filtering for improved tolerance to background noise

- Build-in band-pass noise generator

- Option for measuring T[20] or T[30]

- Option for setting the repetition-count for each measurement

- Ability to detect measurement errors and inform the user through an error-code protocol

- High background noise, insufficient signal volume, low SNR and noise during decay errors detection

- Retry on error automation

Noise Measurements

- Digital VU and numeric visualizations

- Broadband RMS, Peak, Max, Min, Leq and measurement duration data handling

- Octave-based RMS, Leq, Max, Min data handling

- Impulsive, Fast and Slow response modes

- A, B, C, D, Z weighting filters

Advanced Calibration

- Calibrated and equalized for each iPhone model

- Calibrated for the MicW i436, as an external input source

- Calibration data is OTA (Over the Air) updated

- User calibration and equalization facility

- Custom octave-based gain adjustment support

Session Management

- Frame-based time-series of measurement data handling

- Overall statistics calculation for noise measurements

- Event detection timeline annotation for long-term monitoring

- Photo capture capability

- Time and geolocation awareness support

- Title, location and comments metadata support

- Audio recording (CAF format), measurement data (CSV format) and metadata export capabilities

Additional Capabilities

- Option for keeping the device awake during recording

- Option for auto-stopping measurements after a preconfigured duration

- Background recording capability

- Upside down orientation support,

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