<![CDATA[SoliForum - 3D Printing Community — What do you know about decibels/alarms?]]> https://www.soliforum.com/topic/13424/what-do-you-know-about-decibelsalarms/ Mon, 18 Jan 2016 03:08:52 +0000 PunBB <![CDATA[Re: What do you know about decibels/alarms?]]> https://www.soliforum.com/post/114373/#p114373 It's hard to get good free full time help anymore!!!   lol

]]> Mon, 18 Jan 2016 03:08:52 +0000 https://www.soliforum.com/post/114373/#p114373 <![CDATA[Re: What do you know about decibels/alarms?]]> https://www.soliforum.com/post/114372/#p114372 How about a modeler that shows the effect of shaping the sound wave with a tube or horn/funnel?

]]> Mon, 18 Jan 2016 03:05:46 +0000 https://www.soliforum.com/post/114372/#p114372 <![CDATA[Re: What do you know about decibels/alarms?]]> https://www.soliforum.com/post/114368/#p114368 Funny, Tim, I just found a web site that showed me that. Thanks.

]]> Mon, 18 Jan 2016 02:57:10 +0000 https://www.soliforum.com/post/114368/#p114368 <![CDATA[Re: What do you know about decibels/alarms?]]> https://www.soliforum.com/post/114322/#p114322 Decibels are on a logarithmic scale, so two sources of 130dB would be 133dB.

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

]]> Sun, 17 Jan 2016 17:38:46 +0000 https://www.soliforum.com/post/114322/#p114322 <![CDATA[What do you know about decibels/alarms?]]> https://www.soliforum.com/post/114321/#p114321 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?

]]> Sun, 17 Jan 2016 17:34:46 +0000 https://www.soliforum.com/post/114321/#p114321