Phonogram images on paper

Anything not specifically related to NBTV, but at least of some technical nature that might be of interest to NBTV members. Items for sale and links to retailers do not belong here.

Moderators: Steve Anderson, Dave Moll

Phonogram images on paper

Postby Harry Dalek » Mon Oct 14, 2019 9:53 pm

Absolutely fascinating !

youtu.be/TESkh3hX5oM
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
User avatar
Harry Dalek
"Fester! Don't do that to 'Thing'"
 
Posts: 4090
Joined: Fri Sep 26, 2008 4:58 pm
Location: Australia

Re: Phonogram images on paper

Postby Lowtone » Tue Oct 22, 2019 4:12 pm

This is called Phonautographe, invented by Édouard-Léon Scott de Martinville. The purpose was to make a kind of oscilloscope to visually analyse the sounds. It was never intended for audio playback.
The sound was recovered in 2008 ( ? ) by computer engeeners.
Those are the earliest audio recordings ever.
r a d i o P T T v i s i o n
User avatar
Lowtone
Just nod and pretend you understand me
 
Posts: 284
Joined: Sat Jan 16, 2010 9:45 am
Location: France

Re: Phonogram images on paper

Postby Harry Dalek » Tue Oct 22, 2019 8:01 pm

I found all the experiments very interesting yes a lot of the recordings were more intended for visual only play back if you call that play back by the eye !
So all the experiments can now be heard as in how good or bad was the recording some thing the people that did them would never know.
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
User avatar
Harry Dalek
"Fester! Don't do that to 'Thing'"
 
Posts: 4090
Joined: Fri Sep 26, 2008 4:58 pm
Location: Australia


Return to Off Topic

Who is online

Users browsing this forum: No registered users and 2 guests