Author Topic: hypothetical (Read 1100 times)

FBplmmr · « **Reply #15 on:** January 07, 2007, 10:23:38 PM »

while not always "compact", wives have selective hearing and unique ability to make thier voice impact a precise area in my forehead directly adjacent to a throbbing vein.

I'm not sure if they all have this but if you would like mine I will pay for shipping(one way)... handleing is up to you and performed at your own risk!

hope this helps

Maverick · « **Reply #16 on:** January 07, 2007, 11:05:52 PM »

Can you integrate some PVC pipe into your project? You could use it to "pipe" the sound to the location then add a horn projection to the delivery end to spread the sound there. Perhaps use a small amplifier at the receiving end as well to boost it.

JB88 · « **Reply #17 on:** January 07, 2007, 11:36:43 PM »

maverick...i was thinking along those lines actually and i began to experiment with that notion.

i found the following:

- isolating the sound at its source may require some sort of external sound absorptive covering or alternately a shell which has a layer of insulation so that it does not escape through source.

- any piping used will require that its material reflect sound rather than either absorbing it or vibrating with it. energy loss....actually, this would be even better than absorbtive material...much less loss.

- that i need to find out whether or not sound waves (like light) can be condensed and focused without losing its clarity and becoming muffled. (like my neighbors car bass that makes me want to pull my hair out_still love the idea of turning this thing on them once ... kidding of course...LOL) i am assuming that it can be, but that it must be done by reflection (like a parabolic dish with equal distances between all points center.

tonight i used a length of shop vac piping and a small standard computer speaker (bare speaker wired to input) and found that the device let out lots and lots of sound down its length. there ended up being only a slight difference between the sound directly in front of it and from the side.

i then began wrapping towels around it trying to muffle the sound from escaping from anywhere but the end. it worked a little, but so far unsatisfactory.

it seems that in order to be effective i have to begin to associate sound with its parabala and consider both its direction as well as its frequency or wave.

am i correct with this assumption or have i missed the way that sound travels entirely?

i've worked with light alot....sound is something new...at least anything near this level of specificity.

it also occured to me that i could essentially reverse engineer a dish microphone, but that it may be difficult to focus with any real degree of clarity.

anyone think that could work or would the wave expand once it left the dish?

i'd like to get the sound down to lets say a 10 ft area on a vertical grid 100 ft away.

JB88 · « **Reply #18 on:** January 07, 2007, 11:44:28 PM »

Quote

Originally posted by Maverick
Can you integrate some PVC pipe into your project? You could use it to "pipe" the sound to the location then add a horn projection to the delivery end to spread the sound there. Perhaps use a small amplifier at the receiving end as well to boost it.

ultimately, i would like the delivery device (along with whatever it needs on its end) to be the only objects involved. just reread that...thought i should clarify.

i appreciate yours and everyones input here so far. thank you.

Debonair · « **Reply #19 on:** January 08, 2007, 01:33:39 AM »

i am reminded of that frequently quoted tale of the flame thrower's invention

JB88 · « **Reply #20 on:** January 08, 2007, 02:41:43 PM »

Suave · « **Reply #21 on:** January 08, 2007, 03:08:52 PM »

100' of string and two cans fits your requirements the best.

Laser sound doesn't because it could heard by somebody standing between you and your target.

JB88 · « **Reply #22 on:** January 08, 2007, 03:10:34 PM »

it would be PERFECT if it could not be heard between source and target

Chairboy · « **Reply #23 on:** January 08, 2007, 03:14:03 PM »

A nine volt battery attached to a little circuit that beeps once every 5-15 minutes, and looks completely innocuous. Drop that through an open window. During the night, it'll keep 'em from going to sleep. Convinced it's a smoke alarm, they'll stay up all night trying to track down the sound. But the interval is so long that it'll take ages to find it.

...is something I'd never do.

Suave · « **Reply #24 on:** January 08, 2007, 03:14:50 PM »

like 2 cans and a string ?

Suave · « **Reply #25 on:** January 08, 2007, 03:16:27 PM »

oh nevermind. didn't realize you meant for harrasment purposes.

Suave · « **Reply #26 on:** January 08, 2007, 03:20:41 PM »

Go to the pet store and buy a bunch of krickets. Wait I don't think those type make noise.

JB88 · « **Reply #27 on:** January 08, 2007, 03:24:26 PM »

it is not for harassment purposes. though, considering that they (the illegals) have threatened me with physical harm more than once, it would probably be easilly justified. these are a bad batch.

in a fantasy world, it would be quite funny to use something like that to convince them that their house was haunted, but i am not so diabolical.

it is for an installation art piece.

dmf · « **Reply #28 on:** January 08, 2007, 03:25:00 PM »

Quote

Originally posted by Neubob
Piss off your wife and stand 100 away.

Oh yea do that and the sound will be really loud and perfectly clear

JB88 · « **Reply #29 on:** January 08, 2007, 03:34:12 PM »

this is an example of an installation art piece.

12 towers, each an aquarium, each containing a single goldfish.

all have a water spicket attached which is slowly letting the water drip from the containers and into a tin bucket below.

the room is filled with the random sounds of the drips echoing throughout the room.

see. not diabolical at all.

-

(btw. does anyone know how to say "get out" in spanish?)