[steffan]

No, there's more than enough noise to cause permanent hearing damage.

Obviously higher speeds=higher wind noise; you might be fine < 35mph (~ 55kmh) in a city, but anything above that hearing protection is advisable.

"Measurements of motorcycle riding noise levels vary, but are generally around 85-95 dB at speeds up to 35 mph, climbing to 110-116 dB at 65 mph"