I don't think there's much to debunk here.
The idea that urban noise pollution is a significant stressor and leads to shorter lifespans and lower quality of life is noncontroversial, well documented (and is one of the big reasons I now live in the middle of the woods).
The idea that mice generate new brain cells more quickly when they are in silence for 2 hours a day is based on new research, and the research is cited in the article.
The idea that many people meditate in silence on a regular basis and find it calming and relaxing is well documented and goes back thousands of years (I do this, granted my 'silence' is not very silent, eeeeeeEEEEEEeeeeeeeEEEEEEEEEE).
The thing is -- what's being described here in the article, is "quiet", not "silence". Nowhere does it say "go sit in a completely soundproofed chamber". As far as meditation goes, one thing that happens pretty quickly, even if you're in a 'silent' room, is that you become aware of all the sounds around you -- tinnitus, the sound of your breath, the sound of your heartbeat, the sound of lighting systems or HVAC, the sounds of traffic or wind, etc. And, this appears to be sort of geared towards people in urban environments, who are probably being exposed to really constant, stressful sound. Again, the idea that urban noise is really bad for you, is really well documented. One fairly recent study I saw exposed rats to 68db for 24hrs/day or 72db for 10 hours a day, and in both cases found demonstrable brain damage to audio-related cortexes after only a few months. This is far below the level required to cause threshold shifts.
Michael Leigh said:
Silent rooms and surroundings are not good for someone with tinnitus, even if it's low level tinnitus, especially at night time when a sound machine should be used by the bedside.
I know you believe this and it is your experience; again, I disagree pretty strongly. Sleeping with even a quiet fan on makes my tinnitus more obnoxious the next day. Sleeping with earplugs makes me feel relaxed, and has had no negative effect on my tinnitus or hearing, after a relatively long period of time. I am certainly not advocating wearing earplugs 24/7 (I wear them to sleep because of a snoring partner and annoying pets), but I do not think that people "should" do any one thing; rather, we should all experiment and figure out what works for us. I do use a small tranquility fountain in my office most of the time, and I tend to listen to music during the day when I'm working.
I
like silent surroundings. I have gone to great lengths to put myself in an incredibly quiet environment where I hear almost no traffic, airplanes, etc. Of course that doesn't mean it's really "silent"; there is the wind in the trees and the crackle of the ice beneath my feet even in the dead of winter.