Our current Historical knowledge is reconstructed and so frequently misconstrued from the past largely from the study of conflicting texts. Recently Historians have also focused on imagery, the analysis of images and art from the past. Case in point the DaVinci Code.
Other than Modern History, since the inception of audible recordings in the first half of the twentieth century, Historians have never had the inclination or ability to study History utilizing audible assets. Audible history for the large part is considered lost.
We can listen to FDR speak of the day of infamy but we can't listen to Lincolns Gettysburg address, it wasn't recorded. However, a branch of theoretical science or pseudo-science as some prefer to call it, paleoacoustics, argues that we may someday be able to hear Lincolns Gettysburg address or even hear Julius Cesar utter Et Tu Brutus, because it may have conceivably been recorded by natural means which we do not fully comprehend.
Radio and Television at one time were considered Miracles and most people could not fathom how these new fangled devices could transmit voices and light waves, visual images from one part of the world to another. Ask for an explanation of how television works and you'll probably get a canned diatribe about pixels and diodes and so forth, which in reality explains very little.
The same can be said of the theory of paleoacoustics. Gathering trace remnants of electromagnetic waves left over in the environment eons ago and translating them into a viable audible sound wave seems impossible.
The idea is that sound waves might have been recorded and preserved by natural forces unbeknownst to man. One theoretically conceivable way this could occur would be during the creation of pottery. A clay vessel as it is being spun on a potter's wheel and given a spiral pattern with a stylus would be similar to an early phonograph.
With early phonographs, sounds were preserved by using a tin cylinder spun with a needle which etched a spiral groove along the surface of the tin cylinder. The needle would capture sounds waves and duplicate them by etching the vibrations into the grooves on the tin. Later as the technology advanced wax and vinyl or plastics were used - records, LPs. Running the needle along the groove again replayed the sound waves, the first mechanically recorded sounds.
Theoretically, on the potters wheel the soft clay would act as the recording medium, the record or LP, while the stylus would serve as the needle. In theory the sound vibrations could be etched into the clay.
Pottery has been created in this method for at least 3,000 years and probably longer so assuming it works holds out the exciting possibility of bringing back sound waves from the ancient past.
The Lazarus Bowl
When Yeshua aka Jesus was raising Lazarus from the dead, an elderly woman was making a clay bowl nearby. Supposedly the words of Yeshua were recorded in the clay. If the vibrations were enhanced, amplified and recorded in some way, the sounds present at the time of the potteries creation could, in theory, be heard.
This is the idea behind that Lazarus Bowl, that the voice of Jesus when he commanded Lazarus to rise was encrypted into a ceramic bowl being made in the vicinity, and the words recorded are believed to hold the same power if played back.
Unfortunately the Lazarus Bowl Legend is fiction from an episode of the X files, but it does make for good reading.
The X-files agent Scully described a nun at her Catholic school referred to as Sister Spooky who claimed that the aunt of Lazarus was making a clay bowl when Yeshua resurrected Lazarus. His words were recorded in the bowls grooves. While investigating the bombing of a church, broken pieces of a clay pot were found that were believed to be the Lazarus bowl. Sonic analysis was performed on it and indeed found audio data within the grooves. The first part of the data translated into:I am the walrus. I am the walrus. Paul is dead. Goo goo ga joo.
However, the word "walrus" was literally presented as "bearded, cow-like sea beast." The second part of the data was more unsettling: it was of someone commanding someone else to rise from the dead and was recorded in Aramaic, the language of Christ.
A 19th Century Genius, Charles Babbage, who also is remembered for originating the concept of a programmable computer postulated the idea of paleacoustics in the Ninth Bridgewater Treatise
"On the Permanent Impression of Our Words and Actions on the Globe We Inhabit": - Charles Babbage
'The pulsations of the air, once set in motion by the human voice, cease not to exist with the sounds to which they gave rise. Strong and audible as they may be in the immediate neighborhood of the speaker, and at the immediate moment of utterance, their quickly attenuated force soon becomes inaudible to human ears. The motions they have impressed on the particles of one portion of our atmosphere, are communicated to constantly increasing numbers, but the total quantity of motion measured in the same direction receives no addition.
Each atom loses as much as it gives, and regains again from other atoms a portion of those motions which they in turn give up. The waves of air thus raised, perambulate the earth and ocean's surface, and in less than twenty hours every atom of its atmosphere takes up the altered movement due to that infinitesimal portion of the primitive motion which has been conveyed to it through countless channels, and which must continue to influence its path throughout its future existence.
...........There, in their mutable but unerring characters, mixed with the earliest, as well as with the latest sighs of mortality, stand for ever recorded, vows unredeemed,promises unfulfilled, perpetuating in the united movements of each particle, the testimony of man's changeful will.'
In the 20th Century, Richard G. Woodbridge postulated the paleoacoustics theory in 1969, followed by David E. H. Jones of the New Scientist, who wrote that '[A] trowel, like any flat plate, must vibrate in response to sound: thus, drawn over the wet surface by the singing plasterer, it must emboss a gramophone-type recording of his song in the plaster. Once the surface is dry, it may be played back.'
There are two claims that devices utilizing paleacoustic technologies have been built.
One was from an Andrew Basagio who claims to have witnessed numerous Historical events via a secret government project known as Project Pegasus.
The other is from Marcello P. Ernetti, a Benedictine monk, exorcist,a linguist, and musical scholar who also had a degree in quantum physics.
Father Ernetti claims to have built a 'Chronovisor' and peered into history. Both of these claims state that they not only had audio access to the past but visual as well.