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Danger of dBA vs. dBC Noise Levels

Harassed Neighbor

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Our neighbors are harassing us and we believe are using a low frequency audio attack. My sound meter records a dBA reading of 0, but the same meter records a dBC reading of 30-45 dBC. I assume this implies they are emitting a low frequency audio signal in the less than 0-2k range. Is this dangerous? I am sensing a small level of ear ringing. How can I prove it (equipment and method)? I’m a novice, not a professional.
 

boxerfan88

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Cross check readings with a phone app.

On iPhone, you can use Dynaudio Meter app, or another one called dB Meter.
 

Beave

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Neighbors as in the house next door or neighbors as in the apartment next door (or above or below you)?
 

Sokel

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There's no such thing as 0db in a domestic environment.
First reading should read something like 30-40db in a quiet environment.

Try another app.
 

MaxwellsEq

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I assume this implies they are emitting a low frequency audio signal in the less than 0-2k range. Is this dangerous
High sound volumes are dangerous to your hearing, but I'm not aware of any evidence that low frequencies are particularly dangerous. If it was dangerous, large cathedral organs would pose a risk.

There are lots of reasons why your brain detects resonances in your ears. Quite a lot of them are not external, e.g. tinnitus which has a low frequency version associated with Ménière's Disease. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2686891/
 

OldTimer

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High sound volumes are dangerous to your hearing, but I'm not aware of any evidence that low frequencies are particularly dangerous. If it was dangerous, large cathedral organs would pose a risk.

There are lots of reasons why your brain detects resonances in your ears. Quite a lot of them are not external, e.g. tinnitus which has a low frequency version associated with Ménière's Disease. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2686891/
Is it caused by sub-woofer? All day long music with subs.
 

Killingbeans

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Our neighbors are harassing us and we believe are using a low frequency audio attack.

When you say "are harassing us", do you mean that they have been antagonizing you deliberately in other ways, and now just up the game by playing loud music?

Do they have any reason to show hostile behavior? Do the attack manifest itself as an audible rumble, or do you go purely by a suspicion?

Have you tried talking to them in a calm manner?

My sound meter records a dBA reading of 0, but the same meter records a dBC reading of 30-45 dBC. I assume this implies they are emitting a low frequency audio signal in the less than 0-2k range. Is this dangerous? I am sensing a small level of ear ringing. How can I prove it (equipment and method)? I’m a novice, not a professional.

I assume you mean "in the 0-2k range". Less than 0Hz can't really be done :D

30-45 dB doesn't sound like much, even with C weighting. I'm thinking it's simply road noise and/or rumble from building utilities.

I suggest doing the same measurements both outside and other places inside the building to gain some perspective.
 
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fpitas

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30-45 dB doesn't sound like much, even with C weighting. I'm thinking it's simply road noise and/or rumble from building utilities.
Yeah. Not sure where we're supposed to go here.
 

fpitas

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One reason I moved to the middle of nowhere is the low noise floor, for accurate listening. But if you live near civilization, you'll get numbers like you do.
 

fpitas

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Killingbeans

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Convince him/her to make peace with the neighbors (fat chance), or to go to a psychiatrist (even fatter chance).

Or maybe just go to an ENT doctor to find the real reason for that ear ringing :D
 

fpitas

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Convince him/her to make peace with the neighbors (fat chance), or to go to a psychiatrist (even fatter chance).
When I lived in a condominium near a traffic circle I accepted a certain amount of noise. And we have no particular reason right now to think the neighbors are responsible.
 

fpitas

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Still, in the spirit of preemptive action, I have to recommend confronting the neighbors, and not taking No for an answer!

/I have lots of bad ideas.
 

pkane

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Still, in the spirit of preemptive action, I have to recommend confronting the neighbors, and not taking No for an answer!

/I have lots of bad ideas.

A better idea is to fight fire with fire: get 2-3 subwoofers and set them up to play constantly, at a higher level than the neighbor's.
 

fpitas

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A better idea is to fight fire with fire: get 2-3 subwoofers and set them up to play constantly, at a higher level than the neighbor's.
That. Occasionally screaming and beating on the wall will get the message across!
 

fpitas

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NOISE-LEVEL-DECIBEL-CHART.png
 

Chr1

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First try to reason with them...

No joy? Then go nuclear with large subs and dubstep.
 
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