In short: Acoustic monitoring in care homes replaces routine night checks with bedroom sensors that alert carers when a resident coughs, calls out or gets out of bed, and Dorset's six-home pilot reported 49% fewer falls and 64% fewer ambulance callouts. Every one of those sensors is a Wi-Fi device, so the home's network becomes part of the safety system the night the hourly checks stop.
Key Takeaways
- The outcomes are now measured — Dorset's Digitising Social Care pilot across six homes and 184 sensors reported falls down 49.2%, unwitnessed bedroom falls down 58.2% and hospital transfers down 79.3%.
- Wi-Fi in every bedroom is a stated prerequisite — Dorset Council listed strong Wi-Fi across the whole home, a digital care record and a power socket in each bedroom as entry conditions for the pilot.
- A silent sensor is an unchecked resident — once a home reduces scheduled night checks, a bedroom with patchy coverage is a room nobody is watching, so test coverage at night and alarm on sensor dropouts before go-live.
In a nutshell
What is acoustic monitoring in a care home?
Acoustic monitoring is a bedroom sensor, usually a microphone combined with an infrared motion detector, that listens to a resident through the night and alerts staff on a handheld device when something sounds wrong. A cough that persists, a call for help, someone getting out of bed at 03:00 when they normally sleep through: each of these raises an alert, so a carer goes to the room because there is a reason to, rather than because the clock says so.
The approach has been common place in Dutch care homes for around two decades. In the UK the best-known supplier is Ally Cares, whose sensors were used in the Dorset pilot described below, and the technology has moved quickly from innovation project to procurement line. Researchers at Coventry University, writing up a four-year study at WCS Care homes in Warwickshire, noted that a National Care Forum survey placed acoustic monitoring among the four technologies care homes most wanted to adopt, alongside medication management, electronic care planning and GPS trackers. The same paper records a government proposal that 20% of care homes should introduce it by March 2024.
The alternative is the scheduled night check: a carer opens the door every hour or two to confirm the resident is safe. That check wakes people up, and it still misses the fall that happens five minutes after the door closes. Acoustic monitoring promises fewer interruptions and faster response at the same time.
What did the Dorset acoustic monitoring pilot find?
The clearest UK evidence so far comes from Dorset. Funded through the Department of Health and Social Care's Digitising Social Care (DiSC) programme, Dorset Council ran the pilot on behalf of the Dorset Integrated Care System, covering homes in both Dorset Council and Bournemouth, Christchurch and Poole Council areas. Six care homes took part, with 184 sensors installed between January and March 2025.
The council published the results on 21 January 2026, comparing metrics before and after installation:
- Total falls fell by 49.2%.
- Unwitnessed bedroom falls fell by 58.2%.
- Ambulance callouts fell by 63.7%.
- Transfers to hospital fell by 79.3%.
- Days spent in hospital fell by 72.6%.
- Safeguarding notices fell by 51.9%.
Five of the six homes saw positive outcomes, two thirds reduced their scheduled night checks, and half reported residents sleeping better. Those are large numbers from a small sample, and the full evaluation is due to be published by the NHS; we would want to see the underlying data before treating the percentages as a planning assumption. However, the direction is consistent with the WCS Care study, and for an integrated care board weighing the cost of a single hip fracture admission against the cost of a sensor in each bedroom, the case does not need the Dorset figures to be exact.
Why does acoustic monitoring depend on care home Wi-Fi?
Because the sensor has to tell someone what it heard, and in almost every UK deployment it does that over the home's Wi-Fi. Dorset Council's own description is explicit: the system uses "a wi-fi connected sensor that detects changes in sound during the night and then alerts staff via their handheld device." Before any home joined the pilot, Dorset and Ally ran site inspections against three essential requirements: (i) a digital social care record system, (ii) strong Wi-Fi connectivity across the home, and (iii) power outlets in each resident's bedroom.
The second requirement is the one most homes underestimate. A care home's Wi-Fi was usually installed to serve the office, the lounge and perhaps visitors' phones, and it is judged by whether the manager can open the rota. Acoustic monitoring asks something different of it, in three ways.
Firstly, coverage has to reach the far corner of every bedroom, including the rooms at the end of the extension, behind two fire doors and a stairwell. Fire doors, solid internal walls in converted Victorian houses and foil-backed insulation in newer extensions all attenuate Wi-Fi, and a 40-bed home typically has a handful of rooms where the signal is marginal.
Secondly, the alert has two wireless legs. The sensor reaches an access point, and the carer's handheld, which is roaming the corridors, has to receive the alert wherever it happens to be. A dead spot in the laundry or the back stairs means a carer who misses an alert while attending another resident.
Thirdly, the network must hold up at night, when nobody is around to notice it has failed. A router that reboots for a firmware update at 02:00, or a broadband line that drops for twenty minutes, would barely register during the day. At night it can be the whole window in which a fall goes unseen.
What happens when a bedroom sensor drops off the network?
Acoustic monitoring changes who carries the risk of a coverage gap. Under hourly checks, a resident in a room with poor Wi-Fi is no worse off than anyone else: the carer still opens the door. Once a home has used acoustic monitoring to reduce scheduled checks, which two thirds of the Dorset homes did, the sensor becomes the check. If that sensor has dropped off the network, the resident is no longer being monitored, and nobody necessarily knows.
The mitigation is partly technical and partly procedural. On the technical side, the system should treat a sensor going offline as an alert in its own right, raised on the same handheld as a fall alert, within minutes rather than in a morning report. Operators should ask suppliers exactly how long a sensor can be silent before the system flags it, and whether that flag reaches the night staff or only the dashboard.
On the procedural side, the care plan for any resident whose checks have been reduced should say what happens when their sensor is offline: revert to scheduled checks until it is back. That is a simple rule, and it closes the gap. It also creates a direct incentive to fix the coverage, because every offline sensor adds a round of manual checks to a night shift that is already thinly staffed.
There is a further dependency to understand. If alerts route through a cloud service before reaching the handheld, the broadband line is in the alert path, and a line failure stops alerts across the whole home at once. Some systems handle alerts locally; we would ask each supplier to draw the alert path on a single page, from microphone to carer, and mark every component that needs mains power or an internet connection.
How should a care home test its Wi-Fi before installing acoustic monitoring?
Test it in the conditions the system will run in: at night, in every bedroom, with doors closed. A daytime walk round with a phone showing full bars in the corridor tells you very little about the far wall of room 27 with the fire door shut.
A practical test, which a competent installer can typically complete in a day, covers five things:
- Signal in every bedroom, measured at the point where the sensor will be mounted, with the door closed, recorded on a floor plan. Ask the supplier for its minimum signal level in writing, and measure against it.
- Roaming along the night route, walking the corridors, stairs and sluice rooms a carer will cover, with a handheld connected, noting where it drops or hesitates.
- Capacity, counting the devices the network will carry at night: one sensor per bedroom, the handhelds, the digital care record tablets, any nurse call and door-entry equipment, plus residents' own phones and tablets on the same access points.
- Power resilience, checking whether the access points, switches and broadband router are on a UPS, and for how long. A sensor in the bedroom keeps running in a power cut only as long as the network behind it.
- Broadband failover, confirming whether the home has a second internet path, such as a 4G or 5G backup router, and whether it switches over automatically.
Dorset's pilot screened homes on this basis before installation, and participating homes rated the system's reliability 100% positive. That result partly reflects the selection of homes whose networks were already good enough, and operators planning a wider rollout should expect some homes to need network work first.
Where does private 5G fit, and where doesn't it?
For most single-building care homes, the right answer to patchy acoustic monitoring coverage is a properly designed Wi-Fi network: enterprise access points placed from a survey rather than guesswork, wired backhaul, a UPS, and a broadband backup. Current acoustic monitoring sensors are Wi-Fi devices, so a private cellular network cannot connect them directly, and we would be wary of anyone who suggests otherwise.
Private 5G and 4G earn their place in a narrower set of circumstances, which nonetheless describe a meaningful share of the UK's care estate. The first is the sprawling site: a home spread across an original house, two extensions and a separate dementia unit, where running cable between buildings is disruptive and Wi-Fi mesh links are fragile. Cellular radio was designed to work through walls and across car parks, so a private small cell can link each wing to the core network, with a cellular router feeding local Wi-Fi in each wing over a managed, private connection. The second is the home where the same network now carries several safety systems at once: acoustic monitoring, digital nurse call, the digital care record on carers' handhelds and telecare equipment that lost its analogue line. At that point the network is safety infrastructure, and separating it from residents' streaming and visitors' phones, with its own coverage design and monitoring, starts to justify the cost. The third is groups that want one network design, one support contract and one set of coverage reports across dozens of homes, rather than whatever each building's original installer left behind.
The trade-off is cost and complexity. A private cellular network costs more than a Wi-Fi refresh for a straightforward building, and it adds SIMs and a radio licence from Ofcom's shared access framework to the operator's responsibilities. For a 30-bed purpose-built home with sound Wi-Fi, that is unnecessary. For a 90-bed multi-building site where the night team relies on handheld alerts reaching them in every corridor, it is worth costing against the alternatives.
Whichever network carries the alerts, the order of work is the same. Before signing for acoustic monitoring, commission a night-time coverage survey of every bedroom and the carers' route, ask the supplier for its minimum signal level and its offline-sensor alert time in writing, and write the "sensor offline, revert to checks" rule into the care plans of every resident whose night checks will be reduced.