Active noise cancelling technology
Active noise control (ANC), active noise cancelling, and active noise reduction (ANR) are names of method where an unwanted sound is reduced by adding another sound specifically made to cancel it out. Active noise cancelling technology uses a microphone to sample the sound, and a speaker to create a phase-shifted sound that cancels the original sound.
Why active noise cancelling
Traditional passive earplugs
Traditional earplugs use passive attenuation to reduce the level of sound entering the ear. Whilst they are good at blocking high-frequency sound, they are quite poor at reducing low-frequency sound, especially below 200 Hz.
Thus, the problem area for traditional earplugs is these low frequencies. Examples of such penetrating low-frequency sounds are airplane noise (noise level peaks at 70 Hz), noise in factories and noise that comes through the walls of buildings. When you use passive earplugs on an airplane, you will notice that, although it reduces sounds from people chatting in the cabin, the background engine noise is almost unchanged.
QuietOn active noise cancelling earplugs
QuietOn earplugs combine the advantages of in-ear passive earplugs with active noise cancelling, providing optimal noise reduction across the whole audible spectrum, especially most effective at low frequencies such as snoring sounds, ambient noises coming through walls, or airplane cabin noises.
Snoring is mostly comprised of these low-frequency sounds. That’s why QuietOn earplugs can drown out significantly this annoying noise and bring you a good night’s sleep.
the battle between
Active noise cancelling vs noise masking
Active noise cancelling
Active noise cancelling technology uses a microphone to sample the sound, and a speaker to create a phase-shifted sound that cancels the original sound.
There are also a couple of noise-masking devices on the market. They do partly mask some part of the noise, but unless a very loud masking level is used, you still can hear both the masking noise (i.e., rainfall) and the snoring from your partner.
A revolution in size
The smallest active noise cancelling device
We have analyzed different ear anatomies to find the perfect shape and spent countless hours finding ways to make the technical components even smaller, fitting in a small plastic earplug body without compromising performance. The earplugs can cancel up to 40dB and have a long battery life of 50h (first model) and 20h (second model).
We cooperated with industrial designer, Antti Ylisassi, who has worked as a design lecturer, designer, and design manager across Europe, e.g. in Düsseldorf, Stockholm, and Helsinki. His experience and expertise help perfect the sleep earplugs, bringing the most to sleepers.
QuietOn holds a concept patent for active noise cancelling earplugs which fit in ear anatomy. FI26466 (Finland), 10171904 (USA).
QuietOn active noise cancelling earplugs (Original model) are also certified hearing protector device EN352 by 89/686EEC. Notified body PZT GmbH nr 1974.
How quieton earplugs work
In QuietOn Sleep, the microphone is located outside like on many other active noise cancelling devices. This is called Feed-forward Active Noise Cancelling. The internal mic system used on QuietOn Original is called Feedback Active Noise Cancelling.
In active noise cancelling, the difference is that the outside microphone has a time advantage over internal mic which enables noise cancelling to work at higher frequencies. With the first and second model, QuietOn is proud to be the first smallest active noise cancelling device.
Clever additional feature: Mode Switching Button
QuietOn Sleep also includes the option to switch between the silent and the hearing mode. When using the hearing mode, you can communicate with others and there is no passive attenuation. Also in hearing mode, when the sound level exceeds the harmful level, the passive attenuation starts to take effect. With silent mode, both active and passive attenuation are in use.