In a British study, sales teams used one of three headsets - left, right, both ears - for a day's selling of insurance by telephone. Those who wore the headset on their left ear outsold the others.

在英国开展的一项调查中，电话销售保险的小组使用了三种耳机——左耳机，右耳机，双耳机——一天下来，使用左耳机的销售人员业绩最好。

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Ericsson Telephone and GN Netcom for the headsets.

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Plantronics (number 43), a telephone headset maker, had its eye on Clearvox, which produces cellular headsets.

FORBES: The Race To Embrace

Plantronics, in Santa Cruz, California (No. 43), a telephone headset maker, had its eye on Clearvox, which produces cellular headsets, but it wanted to make sure that its target shared its obsession with customer service.

FORBES: The Race To Embrace