
With the quieter System One, everyone can sleep easier.
A quieter System One
While everyone values peace and quiet at bedtime, the level of noise generated by many sleep therapy systems makes it difficult for patients – and their bedmates – to find either peace or quiet. And when patients can’t sleep, their compliance declines and their complaints to providers and clinicians may rise. That’s why we improved the most intelligent sleep therapy system on the market – our System One – by significantly reducing its noise levels while the patient is breathing.How did we do it? By listening closely to patients, providers and clinicians. What we heard inspired us to develop a number of technical innovations that make System One even quieter than before.
Reducing noise in the delivery of comfort
The most significant System One enhancement is the addition of our advanced new WhisperSmart technology, designed to make our industry-leading Flex Family of pressure relief technologies operate more quietly. It’s an unbeatable combination, with patented, flow-based Flex technology automatically delivering the right amount of pressure relief on a breath-by-breath basis, and WhisperSmart technology bringing noise levels down even farther.
Proven results, supported by laboratory testing
Some devices seem to be quiet when turned “on” but not connected to a patient. In contrast, our enhancements to System One make it one of the quietest devices on the market when it matters most: when patients are breathing on it, and actively using it to improve their ability to get a restful night’s sleep. But don’t take our word for it: testing by an independent, third-party laboratory shows that the System One REMstar Auto is quieter than the ResMed S9 AutoSet.
The results speak for themselves

System One is 25% quieter than the S9*
This graphic shows the results of the noise comparison between the System One and the ResMed S9 devices during lab testing. It paints a very clear picture of the difference between the two systems while breathing. Without a doubt, System One is quieter. In fact, on average, System One is 25% quieter than the S9 during simulated breathing conditions.
With or without a humidifier, and at varying comfort relief settings, System One outperformed the S9 in an area critical to patient compliance – the ability to operate quietly when in use.
System One: less is more
With Flex and WhisperSmart technologies and a host of other innovative, patient-centric features, it’s easy to see why the industry’s most intelligent sleep therapy system is the smart choice. While the new, dramatically quieter System One provides more comfort and flexibility, it also provides less. Less nighttime interruption for patients and their bed partners. And potentially less complaint and callback aggravation for providers and clinicians. Because when it comes to noise, less really is more.
(*Models tested: Philips Respironics System One REMstar Auto and ResMed S9 AutoSet.)