A night check wakes the person being checked on. That is the problem this class was built for: staff who need to know something is wrong without opening every door at two in the morning. When a sound crosses a set level, or matches a type such as a thud or a cry, an alert reaches the station and a person decides whether to go in.
Key facts
- The building is already noisy, and staff are the reason. Across four nursing homes, 118 incontinent residents monitored over two nights, noise and light changes from general environmental events and nursing care practices "were associated with 50% of all waking episodes of 4 minutes or longer", and the primary sources of noise were nursing staff (Schnelle et al., J Am Geriatr Soc, 1993).
- In three English dementia homes, monitoring tools "generated frequent alarms that placed a burden upon staff" (Hall et al., International Journal of Nursing Studies, 2017).
- Most published results in this category are vendor case studies or vendor-partnered reports, without control groups. Ally Labs, for example, states that "care homes using Ally have slashed bedroom falls by 63%" (allycares.com, checked 2026-09-07); no method, period, population or study is published beside the figure on the page we checked. Treat headline reductions accordingly, and ask for the underlying study by name.
Listings 1
Canadian availability is not publicly stated for any listing below; each listing says so in its own row. Every attribute carries a source URL and the date it was checked. Anything we could not confirm is shown as “Not publicly stated”, never guessed.
Two designs, and the sound each one listens for
Threshold systems alert when sound in a room passes a level set individually for that resident, so a loud snorer is treated differently from a quiet sleeper. Sound-class systems try to name the sound and alert only on the types a home has selected: Ally Labs describes technology that "learns to differentiate between resident activity and normal background signals to detect when residents are calling for help, are awake and active, unusually restless, or in discomfort" (allycares.com, checked 2026-09-07).
Both are sold on the same promise: enter fewer rooms without leaving residents unheard.
What "listening" means in practice
It usually means a person can hear the room. Ally's own description of the staff workflow is that "Care staff simply check alerts on a smartphone, review sensor data, listen to audio samples, and assess whether residents need their assistance" (allycares.com, checked 2026-09-07).
That is the honest centre of this category, and it is why the privacy question here is sharper than for any other sensor class. A microphone in a bedroom captures the resident, their roommate, their visitors and the staff — including conversations that have nothing to do with an alert. Whether audio is streamed live, sampled, stored or discarded is a question with a different answer at every vendor, and it belongs in the procurement file, not the brochure.
A quieter ward is not the same as better sleep
Alarm fatigue is the common failure, and it is not the only one. A trial in eight nursing homes with 267 incontinent residents cut nightly intervals above 50 dB from 83 to 58 and light changes from four per night to two — and still only two sleep measures improved significantly (Schnelle et al., J Am Geriatr Soc, 1999). A quieter room is not automatically a rested resident.
Our acoustic monitoring explainer sets out what each study did.
Where it fits: a staffed building, at night
Care homes, retirement homes and supportive housing at night, where staff are on site and can respond within minutes. It fits poorly in a private home with no one awake nearby, and it is the sharpest privacy question of any sensor class because a bedroom microphone also captures staff, visitors and roommates.
The camera-free alternatives, side by side
If the objection is the microphone rather than the monitoring, the same room can be covered by sensors that capture nothing to listen to: radar presence sensors report presence, movement and prolonged stillness for one room with no lens and no microphone, and Wi-Fi sensing reports coarse whole-home motion from the router. Neither hears a call for help — which acoustic monitoring can, and they cannot. What each sensor senses, room by room, is set out in PIR vs mmWave vs Wi-Fi vs acoustic; the microphone column for every listing is in the directory comparison.
What to ask before buying
- Is audio recorded, replayed, transcribed, or discarded? Ask for the product privacy policy, not the brochure.
- Can a human listen live? Who, and under what rule?
- Is there any video component, and can it be disabled?
- How is resident consent handled, including substitute decision-makers?
- What is stored, for how long, and in which country?
- Is there Canadian availability, hosting and support?
- For any published reduction in falls or night checks: which study, what period, how many homes, and was there a control group?
What it cannot hear
It cannot hear a silent event. A slow slide from a chair to the floor, a resident who has not moved in hours, or someone leaving quietly at 2 a.m. make little noise and will not reliably raise an alert.
Sound recognition is imperfect, and vendors say so in their own terms and conditions. Acoustic monitoring does not detect falls on its own.
Where WalledCare fits
WalledCare is not acoustic. It has no microphone and captures nothing said in the room. It is a camera-free radar sensor reporting presence, movement, prolonged stillness and prolonged inactivity, room by room, and its own pages state that it is "Built & hosted in Canada". It does not detect falls, hear a call for help, measure breathing, or work as a medical device, and it cannot replace a call bell or staff judgement. See the WalledCare listing, the methodology, or how WalledCare works.
Sources
- Schnelle JF et al. The nighttime environment, incontinence care, and sleep disruption in nursing homes. J Am Geriatr Soc (1993). https://pubmed.ncbi.nlm.nih.gov/8409176/
- Schnelle JF et al. The nursing home at night: effects of an intervention on noise, light, and sleep. J Am Geriatr Soc (1999). https://pubmed.ncbi.nlm.nih.gov/10203118/
- Hall A et al. Implementing monitoring technologies in care homes for people with dementia. International Journal of Nursing Studies (2017). https://doi.org/10.1016/j.ijnurstu.2017.04.008
- Ally Cares home page — Ally Labs. Checked 2026-09-07. https://www.allycares.com/