Usage of Bluetooth headsets in Europe has increased since last year, with 36% of drivers now using a Bluetooth earphone every day. However, daily usage of Bluetooth headsets in the USA has fallen. Only 26% of Bluetooth headset owners now use their devices every day, down from 43% in 2008. The findings were gathered from surveys with 625 consumers in the US and Western Europe by Strategy Analytics and are published in the company’s latest report. [Press release via BusinessWire].