Auto Vibrate: location & time-triggered silent mode (Android)

http://www.addictivetips.com/mobile/auto-vibrate-location-time-triggered-silent-mode-android/

/ user-defined ringer /

Microsoft gets silent upgrade religion, will push IE auto-updates

http://m.computerworld.com/s/article/9222690/Microsoft_gets_silent_upgrade_religion_will_push_IE_auto_updates

Prius gets a low speed sound for the blind (video & audio)

At parking lot speeds, electric & hybrid cars are almost silent.  A risk to the blind, partially sighted & simply inattentive has been suggested.  Legislation has been mooted.  Toyota is doing something about the silence of the Prius at low speeds:

http://eric3579.videosift.com/video/The-Prius-Gets-a-Low-Speed-Sound-for-the-Blind

To date, there is no suggestion of doing anything about near-silent internal combustion engined cars.

New silent 'Eco Whisper' wind turbine is more efficient than three blade models

Silent plus more efficient – looking good!

http://inhabitat.com/new-silent-eco-whisper-wind-turbine-is-more-efficient-than-three-blade-models/

Yapper Zapper can bring about silence & steep fines

http://www.ohgizmo.com/2011/10/20/yapper-zapper-can-bring-about-silence-steep-fines/

Deathly silence of electric cars

[draft]

Something few thought of was the risks due to pedestrians not hearing approaching, near-silent electric cars.

http://www.independent.co.uk/life-style/motoring/ford-invites-facebook-fans-to-pick-the-sound-of-the-electric-focus-2305581.html