---
title: ENAttenuation
framework: exposurenotification
role: symbol
role_heading: Type Alias
path: exposurenotification/enattenuation
---

# ENAttenuation

The signal strength value.

## Declaration

```swift
typealias ENAttenuation = UInt8
```

## See Also

### Exposure Criteria

- [attenuationDurations](exposurenotification/enexposureinfo/attenuationdurations.md)
- [attenuationValue](exposurenotification/enexposureinfo/attenuationvalue.md)
- [date](exposurenotification/enexposureinfo/date.md)
- [duration](exposurenotification/enexposureinfo/duration.md)
- [totalRiskScore](exposurenotification/enexposureinfo/totalriskscore.md)
- [totalRiskScoreFullRange](exposurenotification/enexposureinfo/totalriskscorefullrange.md)
- [transmissionRiskLevel](exposurenotification/enexposureinfo/transmissionrisklevel.md)
- [metadata](exposurenotification/enexposureinfo/metadata.md)
- [daysSinceOnsetOfSymptoms](exposurenotification/enexposureinfo/dayssinceonsetofsymptoms.md)
- [diagnosisReportType](exposurenotification/enexposureinfo/diagnosisreporttype.md)
- [ENDaysSinceOnsetOfSymptomsUnknown](exposurenotification/endayssinceonsetofsymptomsunknown.md)