| Feature / Version | EASERA | EASERA PRO | MLS Module* | POLARS Module** | TEF/TDS Module |
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| Number of channels | 2 | 32 | |||
| Sample rate | 8 kHz - 48 kHz | 8 kHz - 192 kHz | |||
| Reverberation Time (T10, T20, T30) |  |
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| Signal to Noise Ratio (SNR) | |
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| Speech Transmission Index (STI) According to IEC 60268-16:2020 |
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| STIPa | |
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| RaSTI | |
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| Articulation Loss of Consonants (% AlCons) | |
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| Common Intelligibility Scale (CIS) | |
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| Sound pressure level (SPL) in real time Including: A-, B-, C- and Z-weightings for SPL; and visualization of peak and RMS values for both |
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| Voltage measurements in real time | |
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| Signal generator with typical stimuli Sweep, Log-Sweep, Weighted Sweep, Pink Noise, White Noise, Sine, Weighted Noise |
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| Waterfall plot | |
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| Calibration of in- and outputs For acoustic and electronic measurements |
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| Real time measurements Spectrum, spectrogram, basic transfer function |
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| Early Decay Time (EDT) | |
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| Center Time (ts) | |
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| Clarities (C50, C80) User-defined energy ratios User-defined integration times |
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| Interaural Cross-Correlation Coeff. (IACC) *** | |
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| Energy sum Forward integration |
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| Reflection Index / Reflection Factor in-situ measurement of material properties |
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| Sound Strength (G) | |
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| Relative Strength (Grel) | |
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| Feature / Version | EASERA | EASERA PRO | MLS Module* | POLARS Module** | TEF/TDS Module |
| Statistical properties of single measurements Signal mean (DC), noise mean (DC), signal effective value (RMS), crest factor, absolute maximum amplitude... |
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| Filter functions Low pass, high pass, band pass filters with Butterworth, Chebychev I and Chebychev II characteristics |
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| Window functions Hanning, Hamming, Blackman, Rectangle, Triangle, Kaiser window types |
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| Basic editing Averaging Measurement Files, Adding Measurement Files, Cyclic Move, Undo/Redo, Copy/Paste |
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| Phase spectrum Includes group delay, real and imaginary parts |
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| Noise Criteria (NC, PNC, NR) | |
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| Viewing and processing of multiple measurements | |
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| Impedance measurements *** | |
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| Impulse Response to Noise Ratio (INR) | |
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| Definition (D) | |
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| Echo Criteria | |
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| Lateral Fraction (LF) *** | |
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| Latefal Fraction Coefficient (LFC) *** | |
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| Support (ST1 and ST2) | |
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| Modulation Transfer Index (MTI) and Modulation Transfer Function (MTF) | |
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| Various display units V, dBV, dBu, dBm, dBW, dBSPL, etc. |
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| Feature / Version | EASERA | EASERA PRO | MLS Module* | POLARS Module** | TEF/TDS Module |
| User-defined measurement signals Convert almost any signal to an EASERA stimulus, e.g. WAV files |
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| Automated post processing with editing sequences Apply a number of editing operations automatically |
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| Advanced editing including mathematical transformations Remove DC, Set To Value, Add Value, Subtract Value, Multiply By Value, Divide By Value, Scale To, Square, Square Root, Inverse, Power, Custom Smoothing, Expand/Shrink, Change Length, Divide, Subtract... |
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| Harmonic spectra (K2, K3, ...) | |
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| Total Harmonic Distortion (THD) | |
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| Scale model measurements Using adequate high-frequency measurement setup, EASERA allows to remove air absorption and change sample rates according to ISO 9613 |
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| Tolerance mode to detect sound events and save them to a file automatically | |
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| Measurements with MLS excitation signals Hadamard transformation |
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| 3D directional measurements Using adequate measurement setup, for loudspeakers, microphones, etc. |
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| Automated measurements Support for measuring robots and turntables, such as Four Audio ELF robot, LinearX LT360, Outline ET2 and Outline ET250-3D turntables |
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| TDS measurements - Time Delay Spectrometry | |
* The MLS module is included within EASERA Pro.
** The POLARS module can be combined with EASERA Pro.
*** Using adequate microphone setup.
