Model 831-RT Reverberation Time Analysis Firmware

831-RT firmware was designed with simplicity in mind yet complies with the latest ISO 3382-2 and ASTM E2235-04 measurement standards. It supports both the Integrated Impulse Response and Interrupted Noise excitation methods and includes an automated trigger to easily control the measurement. The on-board signal generator provides a pink or white noise source for optional amplifiers and omni-directional or façade speakers via the AC/DC output connector on the Model 831.

The user can display an individual RT spectrum and discard those with erroneous data. The spectra from multiple positions are ensemble averaged to display an overall RT60 calculation.

A full battery of quality indicators supports the validation of measurements. Additionally, grading of the measurement according to ISO 3382-2 indicates whether sufficient positions (microphone-source combinations) have been acquired to obtain the expected grade: survey, engineering or precision.

Applications

• Reverberation time
• Absorption coefficient
• Room acoustics
• Architectural acoustics

Features

• T20 and T30 measurements according to ISO 3382-2:2008 and ASTM E2235-04
• 1/1 and 1/3 octave band analysis
• Supports Integrated Impulse Response and Interrupted Noise excitation methods
• Built-in pink and white noise generator
• Automated trigger
• Display of RT spectrum, individual and ensemble decays
• Quality indicators to ISO 3382-2
• Field upgradable