From the Sensor Data Table, click on the icon below to view the participant's Audio Data Table:
The table lists samples in reverse chronological order, i.e. starting with the most recent. Only the first 100 samples are displayed. To download the complete data file for the participant, click on the "Download CSV" link.
Click on image for larger view
| Data Type | Definition |
| sbj_id, rsp_id | The mEMA user ID of the participant |
| mbl_code | The Mobile Code of the participant |
| dte_tme | The date and time the sample was taken in UTC to the millisecond |
| ts | UTC timestamp of when sample was taken |
| svy_id | The mEMA ID of survey if sample taken while survey open |
| instance_id | The mEMA ID of survey instance if sample taken while survey open |
| timezone_offset | Difference in minutes from device time to UTC |
| tzx | |
| smp_cnt | Sample Count Number of audio samples recorded at 16KHZ |
| max_amp, min_amp | Max Amplitude, Min Amplitude Range of the amplitude |
| max_amp_abs, min_amp_abs | Max Amplitude Absolute, Min Amplitude Absolute Greater of the negative min or positive max |
| mean_amp | Mean Mean of all values |
| mean_amp_abs | Mean Absolute Mean of absolute range |
| median_amp | Median Median of amplitude |
| rms | Root Mean Sum Root mean sum of amplitude (standard measure of average audio measure) |
| vari | Variance Variance of amplitude of all points in sample |
| std_dev | Standard Deviation Square root of deviance |
| vox_act (Android only) | Voice Activity Number of frames in audio sample in which voice activity is detected Important note: This data is only captured on Android devices. Voice Activity is not captured on iOS. |
| amb_lgt | |
| added | The date and time that the sample was uploaded |
| upload_ts | UTC timestamp of when sample was uploaded |
StDev/Max: maximum Standard Deviation of all recordings (% of max)
How data is collected, delivered and stored.
1. Phone mic records audio sample.
Duration and frequency of sample controlled by researcher
2. Audio sample processed immediately on phone.
3.Key metrics extracted from sample.
4. Audio metrics, not the original sample are sent to secure ilumivu database.
Stored without PII
5. Audio sample deleted from phone.
Can never be restored.