I'm so tired, but I'm safe and still, and outside I can hear cars still passing in the lonely night, and I hope each of them gets to sleep as safely as I do, soon.

One of my favorite bedtime mental scenarios is to imagine I'm on a long road trip, I've been driving all day, and finally I've pulled off to a cheap little motel by the freeway.

Then, you will realize that not only has the masking noise been wiped from your perception, the unwanted noise has as well.ġ7th floor condo with the windows open, december night in Istanbul. In most cases, it will do so after a couple of minutes. Try listening to our traffic noise for a quarter of an hour, and see if your brain slowly learns how to filter it out from your conscious perception. And because of the particular nature of our masking noise, even when the nuisance spikes above the mask, it will still be camouflaged. By sharing the same acoustic properties as the nuisance, our masking signal now achieves higher efficiency and can be used at quieter levels than any other masking sound. Instead of using a simple traffic recording, we use re-synthesis to create an artificial traffic noise, which sounds like static - think of a waterfall - yet retains the important characteristics of the original sound. Of course, the masking traffic noise must be carefully designed such as to offer a better alternative to the original nuisance. In our case, this strategy consists of using one traffic noise to mask another. When the masking levels become too loud for comfortable use, we suggest trying a strategy inspired from a well-know proverb: if you can't beat your enemies, join them! When the frequency characteristics of the masking noise differ too much from the noise you are willing to camouflage, higher masking levels will be needed to cover the nuisance. If you can't beat your enemies, join them

The mask sound effect