What you’re dealing with
Because they are mains powered they broadcast continuously, and because Bluetooth passes through walls easily you will routinely pick up the ones in neighbouring flats.
| Broadcasts as | Sonos Beam, Samsung Soundbar, LG SN, Bose Smart Soundbar |
|---|---|
| Typical battery | Mains powered, always on, always broadcasting |
| Findable by scan | Yes, while powered on |
| Search window | Days to weeks |
Once the battery is gone: Mains powered means permanently discoverable, which is why soundbars turn up in scans day and night.
Where it usually is
Your own living room
Check the obvious before assuming anything.
Through a party wall
The single most common source of a persistent unknown device in a flat.
The flat above or below
Bluetooth passes through floors as readily as walls.
How to search for it
- Check the last-seen map firstBefore you search a room, find out which building. A pin saves you from searching the right way in the wrong place.
- Scan from the middle of the roomNote everything that appears, then select the device you want so the rest of the list drops away.
- Walk and watch the signalSweep in a straight line, give each position a few seconds, and turn 90 degrees when the reading stops rising.
- Search inside things, not across themA strong signal with nothing visible means it is underneath or inside something. Fabric and metal block Bluetooth badly.
Tips specific to soundbar or tv audio
- Note the time pattern. A device present in the evening and gone overnight belongs to a household on a schedule, not to a tracker.
- Walk to the wall and watch the signal. If it peaks against a wall and drops as you step away, the source is on the other side of it.
- Soundbars advertise brand and model plainly, so identification is usually instant.
Other things people lose
The same method applies to these, with different battery windows and different hiding places.
- How to find or identify a smart scale, Months on AAA cells
- How to find tagged power tools on site, Tool batteries last a working day
- How to find a Windows laptop by Bluetooth, Up to a working day in use
- How to find a lost bike computer or sensor, 15 to 20 hours on a head unit
- How to identify or find a dash cam, Runs from the vehicle
- Get warmer, get colder, Inside Scan
- What to set up before you travel, Prevention
- All device guides, the complete list
Common questions
Why does a soundbar show up when my TV is off?
Soundbars stay on standby with the radio live so they can be woken by a remote or a phone. Standby is not off.