Vibrations

Ever since I got my Blackberry, which is set on a demure vibrate like its cousin my cell phone, whenever I hear a vibration I think it's someone dinging me with an all-important email. Which is on occasion true, but more often it's the chassis of the train or the heating system of the building or even (blast it!) someone else's Blackberry. It's very wierd to have vibration (along with ringing, screaming, glass breaking, etc.) hauled into the domain of signifying sounds. And not altogether good.