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Segway's $150 Ninebot Engine Speaker can play music or
up sports car sounds for 23 hours when
charged. The speaker syncs with the scooter's
, so the faster the vehicle goes, the
the speaker's rev sounds are. Segway said its engine speaker acts as a
warning to anyone in earshot that the rider is approaching. Many road safety
believe the speaker could reduce the number of
between scooter riders and pedestrians. However,
are concerned about an increase in noise pollution. They say the
of electric engines is their silence. They believe a simple
sound is sufficient to alert other road users and a V12 sound is overkill.
