The PS4 Slim is most probably going to be announced tomorrow, but today we get more data on how noisy (or quiet) it can be. YouTube user Links-Tech (who is the same who provided the teardown posted earlier today) published a video with a test of the noise level of the new model.
From the video below, while playing No Man’s Sky (that can push the old PS4’s fan quite a bit), the console remains quite quiet, between 21 and 24 dB.
In order to provide a comparison with the old model, I tested my own original CUH-1004a using the same game and the same Android app (Sound Meter). Incidentally, Links-Tech used a Huawei P9 to perform the test, and I had a very similar model available for mine, a Huawei P9 Lite.
You can see the results of my test in the gallery under the video, with the fan generating 28 dB of noise initially, then pitching up to a maximum of 34 dB, and then calming down again to an average of 31 dB, which is considerably more noisy than the slim.
The test was performed in a room kept as silent as possible (while it’s not soundproof, I live in an area without traffic, on the fourth floor of a flat, and all the other electronics in the room were turned off). For clarity, the small spikes you see in the graph are just the shutter sound effect of the phone.