Re: [AFMUG] OT Project update

Thu, 02 Apr 2020 15:47:35 -0700

The well watch sounds like a sudden puff of air. You drop a tube from the unit into the inside of the pipe fitting. From the outside it sounds like a little pop ... pop ... pop.


bp
<part15sbs{at}gmail{dot}com>
On 4/2/2020 3:21 PM, ch...@wbmfg.com wrote:
It will be interesting to see what the well sounding units use for a ping. 
 
Sent: Thursday, April 2, 2020 4:10 PM
Subject: Re: [AFMUG] OT Project update
 
Submarine sonar ping?
 
 
On Thu, Apr 2, 2020 at 4:51 PM <ch...@wbmfg.com> wrote:
Polyethylene has a sound velocity of propagation of a shear wave about 4x the speed of sound in air.  So we have to be careful not to couple any of the strike into the actual pipe itself.  That was a surprising discovery. 
 
Sent: Thursday, April 2, 2020 3:28 PM
Subject: Re: [AFMUG] OT Project update
 
I would think you would want a strike.  Like taking the solenoid from a starter and using that to strike a metal disk.  Disc would need appropriate waveguide to interface with conduit. 
 
On Thu, Apr 2, 2020 at 3:35 PM <ch...@wbmfg.com> wrote:
I hear it hurts. 
 
Sent: Thursday, April 2, 2020 2:33 PM
Subject: Re: [AFMUG] OT Project update
 

Yeah....miniature thunder.

On 4/2/2020 4:04 PM, Ken Hohhof wrote:

I vaguely remember something from about 30 years ago, where they were using focused ultrasound to break up kidney stones.  It looks like the technical term is focused ultrasound lithotripsy.  My recollection is they used a high voltage spark for the sound source.

 

High voltage spark sounds like it would be in your wheelhouse.  Might not work, but still sounds like fun.

 

 

From: AF mailto:af-boun...@af.afmug.com On Behalf Of Adam Moffett
Sent: Thursday, April 2, 2020 2:45 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] OT Project update

 

What's this for anyway?

Big sharp noise through a pipe is what I believe you said you wanted.....but what is the purpose?

I suppose a gunshot sounds sharp in human terms, but it's really rapidly expanding gasses being released.  In hindsight it makes sense that there would be an initial burst followed by diminishing secondary noises.  If that's an issue, then aren't echoes in the pipe an issue too? I don't see how you would avoid the echoes.

-Adam

 

On 4/2/2020 3:37 PM, ch...@wbmfg.com wrote:

Walther handgun will not fire power hammer loads.  Does not seem to strike the rim at all.

But a 1908 Savage rifle will.

Seems gunshots are not a sharp impulse.  Just a burst of noise I have discovered.  No where near a perfect impulse.

So having fun and probably scaring people driving up the highway but on a quest for a high quality shock wave/sound impulse. 

Recording engineers use balloons and clappers. 

 

I have a high power speaker driver coming.  Going to see what happens when I get close to blowing it out with a capacitor discharge. 




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