Bluetooth headset takes aim at windy phone calls

Donovan, John
November 2005
Portable Design;Nov2005, Vol. 11 Issue 11, p40
The article explains the mechanism of Logitech's Bluetooth-enabled Mobile Freedom cellular phone headset that reduces noise in windy environments. The microphone is placed behind the WindStop windscreen, a patented sintered plastic material, and suspended in a small acoustic chamber. Logitech claims that WindStop eliminates 18-20 decibels of wind noise. For this headset, the company chose to rely on mechanical noise filtering instead of digital signal processors, enabling them to cut cost and power consumption, claiming up to 7 hours of continuous talk time and 300 hours of standby time.


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