The EOC audio object supports flexible frequency bins feature. This feature allows you to configure maximum tuning frequency and number of tuning frequency dynamically in the EOC audio object. In earlier versions of EOC audio object, the “MaxTuningFrequency” value was fixed to 220 and the “Number of tuning frequency bins” values was fixed to 32.
If the state variable “MaxTuningFrequency” and additional parameter “Number of tuning frequency bins” are not present in the EOC Audio object, then the default values of the “MaxTuningFrequency” value will be 220 and the “Number of tuning frequency bins” value will be 32.
The flexible frequency bins feature is available from 19.02.01 EOC audio object version.
MaxTuningFrequency: The max tuning frequency can be configured using state variable “MaxTuningFrequency”.
- Range: 20 to 3000
- Default Value: 220
- Location: State Data > Constant Data > MaxTuningFrequency
Number of tuning frequency bins: In additional parameter of EOC audio object, you can configure number of tuning frequency bins.
- Range: 16 to 512
- Default Value: 32
Based on the configured “MaxTuningFrequency” and “Number of Tuning Frequency Bins”, the frequency bins are calculated.
Frequency bins = MaxTuningFrequency/ Number of Tuning Frequency Bins
The flexible frequency bins support all features in following tabs, including Save and Load tuning data in EOC panel.
- EOC MAX
- EOC Speed
- LSPK Weight
- MIC Weight
- EOC Leakage
- FD Stab
- Signals
The above image shows the graph and table for the EOC MAX tab; the value will update based on the “MaxTuningFrequency” and calculated “Frequency bins”.
Here the table and graph of EOC Max tab is updated with MaxTuningFrequency 2500 and Number of Tuning Frequency Bins 25. So there are 25 data points in the graph and 25 rows in the table, with a bin size of 100(2500/25). The same frequency bins are applied in the other tabs as well.
In case of “Signals” tab, all three graphs MicABS, ANCFilterABS, and ANCFilterPhase are updated with these frequency bins.
