nsh123 I would say that if listening to music protects the aging brain, then playing an instrument improves the aging brain. I noticed my brain fog disappear after a few weeks of learning the flute.
I think it's getting back to normal (not improving) by playing musical instrument. Our brain and ears suffer from un-natural hi-fi electronic sounds from every day life for all our lives (speaker sounds on cell phones, radios, audio systems, etc). There is no study about side-effects of un-natural electronic sounds yet. However, I am feeling how bad un-natural sounds are since I acquired a natural sound audio system few years ago.
I agree with you that listening the natural sound more results reduced brain fog and less clumsiness, more energy, clear vision, etc. People need get away from un-natural sounds for their health. Alex/Wavetouch audio