Power, Speed and Accuracy

Advanced algorithms running at 32-bit floating-point resolution function accurately even with signals contaminated by reverberation or noise, and have been accelerated to provide immediate results, displaying, in less than one second, initial curves based on averaging more than 2,000 FFTs per second. Time is spent making important decisions about the sound of the venue instead of waiting and worrying about the reliability (or stability) of the software and computer. With dedicated hardware the reliability and stability is rock solid.

• Real-time data acquisition
• Calibrated 1/3-octave real-time analyzer
• Precision line-spectrum analyzer
• Up to 48 points per octave frequency response

The SIM 3 audio analyzer’s calculations meet the true instrumentation definition of “real-time”: All data presented at the analyzer’s input is used in the analysis. The SIM 3 analzyer uses overlapping windows for its FFTs, so that no data is lost.

SIM 3 displays information above 1 kHz (averaged 16 times) in less than one second, while frequencies from 250 Hz to 1 kHz are displayed in less than three. Frequencies down to 10 Hz take up to 10 seconds to capture (averaging at 16 times).

Real-time data acquisition is key to accuracy in spectral analysis. In a system that is not truly real-time, significant spectral events can be ignored if they occur at the wrong time.

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