<![CDATA[SoliForum - 3D Printing Community — What do you know about decibels/alarms?]]> 2016-01-18T03:08:52Z PunBB https://www.soliforum.com/topic/13424/what-do-you-know-about-decibelsalarms/ <![CDATA[Re: What do you know about decibels/alarms?]]> It's hard to get good free full time help anymore!!!   lol

]]> https://www.soliforum.com/user/2447/ 2016-01-18T03:08:52Z https://www.soliforum.com/post/114373/#p114373 <![CDATA[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?

]]> https://www.soliforum.com/user/2447/ 2016-01-18T03:05:46Z https://www.soliforum.com/post/114372/#p114372 <![CDATA[Re: What do you know about decibels/alarms?]]> Funny, Tim, I just found a web site that showed me that. Thanks.

]]> https://www.soliforum.com/user/2447/ 2016-01-18T02:57:10Z https://www.soliforum.com/post/114368/#p114368 <![CDATA[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

]]> https://www.soliforum.com/user/221/ 2016-01-17T17:38:46Z https://www.soliforum.com/post/114322/#p114322 <![CDATA[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?

]]> https://www.soliforum.com/user/2447/ 2016-01-17T17:34:46Z https://www.soliforum.com/post/114321/#p114321