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# attenuationDurations

An array of durations at specific radio signal attenuations.

```
var attenuationDurations: [NSNumber] { get }
```

## Discussion

An array that contains the duration, in seconds, at certain attenuations, using an aggregated maximum exposures of 30 minutes.

`array[0]` =  Sum of durations for all exposures when the attenuation value was `Attenuation <= X`.

`array[1]` =  Sum of durations for all exposures when attenuation value was `X < Attenuation <= Y`.

`array[2]` =  Sum of durations for all exposures when attenuation value was `Y < Attenuation`.

Use the [`attenuationDurationThresholds`](/documentation/ExposureNotification/ENExposureConfiguration/attenuationDurationThresholds) to configure the `X` and `Y` values.

---

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