What do you know about decibels/alarms?

**Heartlander** · 2016-01-17 17:34:46

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From: Kent from Kansas City
Registered: 2013-06-23
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Topic: What do you know about decibels/alarms?

If one alarm creates a 130db sound, do two create 260db?

I don't think it does, I've tried this. Two is louder than one, but not twice as loud.

My smart phone has a dB Meter app but won't go this loud. I think anything over 130 dB gets into the painful level and may be illegal (think: electronic self defense weapon).

Any sonic gurus here?

How would you make a truly painful or debilitating low-voltage (<24VDC) focused sonic device that beats the 130dB "personal alarms" out there now?

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**elmoret** · 2016-01-17 17:38:46

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Re: What do you know about decibels/alarms?

Decibels are on a logarithmic scale, so two sources of 130dB would be 133dB.

http://www.snapfour.com/CombinedNoise_Calculations.aspx

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**Heartlander** · 2016-01-18 02:57:10

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From: Kent from Kansas City
Registered: 2013-06-23
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Re: What do you know about decibels/alarms?

Funny, Tim, I just found a web site that showed me that. Thanks.

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**Heartlander** · 2016-01-18 03:05:46

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From: Kent from Kansas City
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Re: What do you know about decibels/alarms?

How about a modeler that shows the effect of shaping the sound wave with a tube or horn/funnel?

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**Heartlander** · 2016-01-18 03:08:52

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From: Kent from Kansas City
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Re: What do you know about decibels/alarms?

It's hard to get good free full time help anymore!!!

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What do you know about decibels/alarms?

Posts: 5

1 Topic by Heartlander 2016-01-17 17:34:46

Topic: What do you know about decibels/alarms?

2 Reply by elmoret 2016-01-17 17:38:46

Re: What do you know about decibels/alarms?

3 Reply by Heartlander 2016-01-18 02:57:10

Re: What do you know about decibels/alarms?

4 Reply by Heartlander 2016-01-18 03:05:46

Re: What do you know about decibels/alarms?

5 Reply by Heartlander 2016-01-18 03:08:52

Re: What do you know about decibels/alarms?

Posts: 5