The `noise` field is an attribute of the EGV records: https://github.com/nightscout/android-uploader/pull/128/files, https://github.com/nightscout/android-uploader/blob/df7d25bb7ccc80f5f21185f02c0b560f78900a36/core/src/main/java/com/nightscout/core/dexcom/records/EGVRecord.java
