How can I manage Dreem user accounts?
The creation of a Dreem administrator account will allow you to manage Dreem user accounts. One admin account will allow you to access to the Dreem Portal from which it is possible to manage recording performed with multiple users accounts.
Can I synchronize the headband with another device?
Resynchronizing several devices is not a straightforward process, as each device has its own errors in terms of sampling. When Dreem records sleep, it uses its internal clock that samples at approximately 250Hz with a non-linear error of + or - 3Hz through the nights. Therefore, if you want to perfectly align the Dreem device’s EEG traces with a PSG for instance, you will need to go through a resynchronization process. This resynchronization process involves running an algorithm for resynchronizing the data. We work with an ubuntu timestamp associated with each point of measure to enable resynchronization. For the resynchronization process, we can simply send you the code to be run on Python. Please contact us for further details.
What if my patients don't have WiFi or a smartphone?
It is possible to configure WiFi on the headband using a smartphone before giving it to your patients. They can then launch a recording using the power button located on the top arch of the headband. The headband can store up to 240 hours of recordings without any WiFi connection. However, the headband needs to be plugged in and connected to WiFi so that data can be transferred to servers and accessed on the "Dreem Portal".
Can I use the same headband for several participants?
Yes, you can use the same headband for several participants. Each participant has to be attached to a user account, and each headband can be used for several user accounts. Please see cleaning recommendations in the dedicated section.
What do I need to use the headband?
At first, you will need a smartphone with the Alfin app to 1) connect the headband to the WIFI, so nights recorded on the headband are sent on the server and are available on the Dreem Quality Check Portal. 2) Pair the headband to user account.
Once these two steps are performed, the smartphone is neither required to start a recording nor to upload nights on the servers.
Can I transfer my data with a cable if I don't have a WiFi connection?
Unfortunately not. The data is only transferable via WiFi.
Is it necessary to have WiFi access to upload the data?
Yes. However, the headband can store up to 30 nights or 240 hours before being overwritten.
Do I need WiFi to start my night?
No, you can start your night using the Dreem Alfin.
Do I need the app to start my night?
it is possible to start a recording with the App but not necessary. You can start your night by using the headband’s power button (triple push).
Can I schedule the beginning of the night’s recording in advance?
No, the beginning of the night cannot be scheduled in advance or started automatically/remotely.
If multiple individuals are wearing headbands, is there a way to link them all to one device controlled by the researcher, instead of each participant having the device linked to their personal phone?
One smartphone can be used to link multiple user accounts to their associated headband. To connect headband A to user account A, you will have to log into the app with the user’s credential A, then pair the headband and app together through bluetooth. Sign off the app, and repeat with headband B and user account B.
Note, that if the participants take the headband home, the data will not be uploaded as a WIFI connection is required. (See question 8).
If multiple individuals are wearing headbands, is there a way to differentiate each recording on the Dreem Portal?
Each individual will log in the Aflin app using unique user credentials attributed by the researcher. On the Dreem Portal each recording is associated with a user and a headband.
Does calibration need to be done prior to each use?
No it does not. A live EEG section on the application can help the subject to verify that the headband is well positioned though.
What are the battery life and the charging time of the device?
The average battery life of Dreem 3 is of ~ 25 hours. The charging time is 3h30 min when fully discharged.