Challenge: Nowadays 2 things happen…
(1) In earlier days we were using Ding-Dong bells with heavy sounds. That sound was able to reach to any corner of our home. But Nowadays we have shifted to soft sounded bells (soft polyphonic bells). Sound of these bells are soft in nature so might not reach to every rooms of our home.
(2) As the noise pollution increases in the environment, we are forced to use more robust and more soundproof doors and windows. So when some guest rings the bell and we are at bedroom or at home theater, we might not get the alert. Or sometimes due to some minor sound we think that someone might have rung the bell, so we go out and check the door!! And it becomes a false alarm for us!!