noisy bike, silent indicator on SEAT
Yes, I've had a twin Bonneville 750 for years and I attached a buzzer so I could hear the indicator, but with a crash helmet on you still don't hear anything. The audible warning (or acoustic signal module, as Elsawin calls it) is more for the lights on warning, as it is easy to leave the indicator stalk on for the sidelights position and flatten the battery.