Let’s say there’s a baby’s room at one end of the hall and the parents’ room at the other. Each room has a door, but in this scenario, only one door will be closed, and the other will be open.
If the baby starts crying, does it make any difference which door is closed, in terms of the parents being able to hear, or is the volume just the same in either case when it reaches the parents’ ears?
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Edit: To be super clear, this is hypothetical, and if I had a baby, I’d want to hear the crying if it was happening 🙂
I have a door at the bottom of a stairway that opens to a shared hall with my neighbor, and when she’s jingling her keys and unlocking her door, it sounds like she’s right in my apartment. So I was wondering how well she can hear me at that time. Sounds like, unless there’s something one-way about the acoustics in my stairwell, I should assume she can hear me at that time about as well as I can hear her.
In: 18
In each case, let’s say the door absorbs 10 decibel, and the corridor 10, doesn’t matter the sequence you always lose 20 decibel.
By closing baby door however, you increase the area of the house where you benefit from the door noise reduction, as now you can walk to the kitchen or toilet and still be screened at least by 10 decibel of the baby’s door.
This is assuming math checks out IRL. In don’t think real materials do screen 10 decibel whatever is the source or the distance you put them. Maybe a particular door type is more effective when close to the child or is better at distance from the child.
By the way, decibel is a logarithmic scale, purpose of it is to cancel out vs the inverse quadratic sound behavior. This way we just need simple math. You don’t care to calculate power, a 10 decibel barrier does alway reduce the sound by 10 decibel.
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