big ear, fm transmitter.

[Dazza]

Hi audioguru,

It is an interesting thing wavelength, I'm trying to understand how you could explain, voice wavelength when using the old-fashioned tin can and string intercom. Maybe an resonating affect, but what of the wavelength?. Maybe it is that the energy is transformed from one state to another and then back again.

 

[audioguru2]

Hi Dazza,
Are you sweating down under too while I'm freezing up here? ??? ;D
It's nearly noon and the sun is kinda low 'cause it's shining directly on you! (Except now you have night-time way around there)

The operation of a tin can and string intercom is best understood if you think the string is rigid. Vibrations at one can's bottom at one end cause the same vibrations of the can's bottom at the other end, push-pull. The only effect that wavelength would have is that the can's bottom can't flex enough at low frequencies (it is too small and stiff).
It is true that the can and its bottom resonate. So a tin can and string intercom lacks bass and resonates. That's where the phrase, "tinny sound quality" came from.

 

[steven2]

hear in western australia at the wungong dam there is a cement wall near the lookout piont at one end if you whisper into it and the other end you listen ,you can hear it well so we call it the whispering wall. dazza the old tin can phone or bush phone ive her about that and seen it on tv , its wierd how sound vibrations travel down that string to the tin can you have over your ear, oh by the way the the small spotlight dish i have is got the hole where the globe came from so thats where the mic comes through, so if i was to position the mic to above the phocal piont then i still have that hole to deal with , i geuss i cant seal that hole with putty or blue tac as that may end up as a sound dampener or obsorbant thus cutting the sound reception quality down , somewhere aroung the 10kb potentiometer is a problem i still get the mics sensitivity to jum higher if i slightly press down on the potentiometer shaft, its as if the pot is makeing more contact inside where that thing contacts , thus increaseing the mic sensitivity, now with this increased sensitivity you get the sound of all those cars out there with there engines runing its hard to exsplain, but its the number one thing i hear with the higher sensitivity, and the second is barking dogs and the sound of wind blowing through the tress , as for filtering unwanted sounds i use my ears and brains for that , i dident get any hiss in the head phones , and although i dident put the resister in yet as recamended by audio guru i think, i dident get the big bang just a small click or similiar with would probably be easy to filter out as described under my old posting, pop filtering

 

[audioguru2]

Beer (Carnagie's Porter brand?) makes a very good pop filter, just ask Ante.
A pillow filters a burp pretty well. ;D

Steven, you got a bad pot. :'(

 

[Dazza]

Hi audioguru,

You would have a similar problem as I'm having but opposite. It's that hot you have to drink your beer really fast, before it evaporates from the heat ;D.

I guess you would have to drink yours really fast before it freezes ;D.

Here's another.

Dashing through the snow, in a one horse open sleigh.

Running fast through the sand, before I burn my feet.
;D ;D ;D ;D ;D ;D ;D ;D ;D

Hi steven,

I have heard of that dam wall, I have been meaning to look it up on the net.

Why not glue a marble in the whole, just vandalis an old paint tin, they usually have a marble in them .

I shall be absent for a couple of weeks now, I'm heading up north for Christmas, I guess it's just not hot enough here .
I'll be looking forward to hearing from you all, in the new year, take it easy 8).

 

[steven2]

merry christmass dazza, audio guru and ante. dazza its been hot here in the western part of australia the wheather in queensland is much better as i used to live there to and over the years have been back there a few times my father is moveing to cooyar a small country town , be carefull if your going up north dazza the crocs are everywhere, if you see any yowies let me know thats why im trying to get the best sensitivity of my parabolic mic so the yowie hunters over in queemsland could hear them better