Our Technology

The science behind Sleepwave

Introducing

PureTone Suprasound

The brand name for our “silent sonar” technology that uses inaudible tones to detect motion and biological signals.

We're building the future of sleep technology, and research guides every step. Explore our white papers and science-backed videos to see the thinking behind the Sleepwave technology.

Latest study

In a world-first study published in Scientific Reports, we showed that a phone can monitor breathing by playing a simple pure tone and listening to how it changes. No wearables, no sensors on your body. Watch the video to see how PureTone Suprasound works and why we think it's the future of sleep tracking.

Questions about Sleepwave's technology?

Where should I place my phone?

For best accuracy, we recommend placing your phone above mattress level on a side table or a stack of books if you don’t have one. The microphone should be facing towards you and not covered. We also recommend you have your phone charging if it has under 50% battery.

Phone on stand facing body
Phone on side table level with mattress facing body
Phone on mattress facing body

What does Sleepwave do with my sleep data?

Sleepwave uses your phone’s microphone to detect movement but no audio data leaves your phone. Any technological data collected to enhance our algorithms is fully anonymised. This cannot be used to identify you.

We respect your privacy, so we do not collect any personal data such as age, gender or anything else about you.

Does Sleepwave work if you share a bed with a partner or pet?

Our technology has high sensitivity so it may detect movement from a partner or pet. However the audio signal analysed by Sleepwave will be strongest for the person sleeping closest to the phone.

Do animals hear the tone?

Similar to human brains, animals are naturally inclined to notice moving objects or changing sounds compared to those that remain static or fixed. Sleepwave plays a constant, pure tone that is very quiet, significantly reducing the likelihood of an awareness response.
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Our founder, Jules, has a fluffy dog named Mochi who doesn't notice when the tone is playing.

Is Sleepwave safe to use?

Yes. Sleepwave plays a very quiet, high-frequency tone which most people cannot hear. The energy projected is much quieter than many sounds from other electronic devices and general ambient noise.

If you are sensitive to it, you can take a "sound check" test within the app which helps you find an alternative setting.

Hand holding Sleepwave logo
Copyright @ 2026 Reviva Softworks Ltd. All rights reserved
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