Aerodynamics; Aeroacoustics - SCHUBERTH C4 Manual Del Usuario

6. AERODYNAMICS

Wind noise is low with the C4, both for race-riding and during long touring rides.
The C4 produces practically no uplift even at speed.
Note:
Please note that the strong eddy currents that can occur as a result of
the fairing on faired motorcycles may have a significant effect on the
aerodynamic characteristics of a helmet.

7. AEROACOUSTICS

Various features developed in SCHUBERTH's wind tunnel make the helmet
notably quiet as far as aeroacoustics are concerned, while providing optimised
hearing capability when riding. This enhances concentration, especially at high
speeds.
Note:
Aeroacoustic values may vary according to the type of motorcycle, fairing
design, seat position and physical size of the rider.
Caution:
As a result of the aeroacoustic optimisation of the helmet (and the lower
wind noise inside the helmet that comes with it), your actual speed can
easily be underestimated. Please do not rely on your sense of hearing to
estimate your road speed - always check it using your speedometer.
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