This is so Pavlovian

O ne little point in "Flavia de Luce - Murder in cucumber" I really like: the older sister of 11-year-old Flavia refuses decided to go to the door when the doorbell rings. This is so "Pavlov". Now play the action in the 50s - which had since been to acoustic stimuli? The doorbell, telephone and even the bell of the church tower. If you look at an "average Internet user" now look around, then the offer but much more: a short tone for SMS, sound in phone call buzzer in fixed, door bell in two variants, calendar and mail One pack of tones on the smartphone, laptop and PC, "New messages" beep when Twitter client and Facebook ...