Specifications

EAW Smaart 6 Operation Manual Analysis Modes and Display Types

Synchronous Stimulus Signals

The synchronous noise and sweep options (Pink Sync and Pink Sweep) in Smaart 6’s

signal generator construct repeating sequences of pseudorandom noise or logarithmically

swept sinusoidal signals that are the same length (in samples) as the current FFT size.

Synchronous stimulus enables deterministic, FFT-based frequency/impulse response

measurements with noise rejection characteristics similar to those of MLS and TDS

measurement techniques — without the requirements of data windowing and/or relatively

larger amounts of averaging associated with the use of random stimulus signals in FFT-

based measurements.

The pink spectral weighting options output a signal with equal energy per octave—rolling

off at 3 dB per octave in comparison to a purely random white spectrum. A signal with a

pink spectral weighting will appear to have a flat spectrum when viewed on a fractional

octave RTA display.

3.8 Weighting Curves

Many audio measurement and system set-up applications require some kind of frequency-

dependent weighting curve (i.e., ANSI/IEC A and C). Weighting curves are created to suit

various types of applications ranging from cinema sound to office noise masking systems.

Smaart 6 includes standard A and C weighting curves, as well as X and Inv X, in its

Signal Level/SPL Readout and RTA display. Note that separate Weight controls for

Frequency Response and Spectrum measurement allow each type to be weighted (or

not) independently.

User-defined weighting curves can also be used in both Spectrum and Frequency

Response measurements. Frequency-dependent weighting curves are usually similar to

Frequency Response curves in that they define relative differences in frequencies (i.e.,

+/- x dB, frequency by frequency) so Smaart 6 allows using any 1/24-octave FPPO

Reference Trace as a weighting curve. Anything that can be measured using Smaart 6’s

Frequency Response can be used as a weighting curve. Simply capture and save it as an

FPPO reference trace in the Weighting subdirectory of your EAW Smaart 6 Program

Files folder. Smaart 6 scans this folder on start-up so the new curve appears in the

Weighting drop-list.