Introduction of nhs essay

Patrick Nielsen Hayden

Introduction of nhs essay

Wikimedia Commons has media related to History of sound recording. Dictionary illustration of a phonautograph. This version uses a barrel made of plaster of Paris. In this device, sound waves travelling through the air vibrated a parchment diaphragm which was linked to a bristle, and the bristle traced a line through a thin coating of soot on a sheet of paper wrapped around a rotating cylinder.

Introduction of nhs essay

The sound vibrations were recorded as undulations or other irregularities in the traced line. Scott's phonautograph was intended purely for the visual study and analysis of the tracings. Reproduction of the recorded sound was not possible with the original phonautograph.

These recordings, made circainclude fragments of two French songs and a recitation in Italian. On April 30,he deposited a sealed envelope containing a summary of his ideas with the French Academy of Sciencesa standard procedure used by scientists and inventors to establish priority of conception of unpublished ideas in the event of any later dispute.

This metal surface would then be given the same motion and speed as the original recording surface. A stylus linked to a diaphragm would be made to ride in the groove or on the ridge so that the stylus would be moved back and forth in accordance with the recorded vibrations.

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It would transmit these vibrations to the connected diaphragm, and the diaphragm would transmit them to the air, reproducing the original sound. He had died in at the age of The visitor without any ceremony whatever turned the crank, and to the astonishment of all present the machine said: How do you do?

How do you like the phonograph? The platen had a spiral groove on its surface, like the disk. Over this was placed a circular disk of paper; an electromagnet with the embossing point connected to an arm traveled over the disk; and any signals given through the magnets were embossed on the disk of paper.

If this disc was removed from the machine and put on a similar machine provided with a contact point, the embossed record would cause the signals to be repeated into another wire. The ordinary speed of telegraphic signals is thirty-five to forty words a minute; but with this machine several hundred words were possible.

This pulley was connected by a cord to a little paper toy representing a man sawing wood. Hence, if one shouted: I reached the conclusion that if I could record the movements of the diaphragm properly, I could cause such records to reproduce the original movements imparted to the diaphragm by the voice, and thus succeed in recording and reproducing the human voice.

Over this was to be placed tinfoilwhich easily received and recorded the movements of the diaphragm. I was in the habit of marking the price I would pay on each sketch. If the workman lost, I would pay his regular wages; if he made more than the wages, he kept it. The workman who got the sketch was John Kruesi.

I didn't have much faith that it would work, expecting that I might possibly hear a word or so that would give hope of a future for the idea. Kruesi, when he had nearly finished it, asked what it was for.

I told him I was going to record talking, and then have the machine talk back.

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He thought it absurd. However, it was finished, the foil was put on; I then shouted 'Mary had a little lamb', etc. I adjusted the reproducer, and the machine reproduced it perfectly. I was never so taken aback in my life. I was always afraid of things that worked the first time.

Long experience proved that there were great drawbacks found generally before they could be got commercial; but here was something there was no doubt of. On the early phonograph's reproductive capabilities he writes "It sounded to my ear like someone singing about half a mile away, or talking at the other end of a big hall; but the effect was rather pleasant, save for a peculiar nasal quality wholly due to the mechanism, though there was little of the scratching which later was a prominent feature of the flat disc.

Recording for that primitive machine was a comparatively simple matter. I had to keep my mouth about six inches away from the horn and remember not to make my voice too loud if I wanted anything approximating to a clear reproduction; that was all.

When it was played over to me and I heard my own voice for the first time, one or two friends who were present said that it sounded rather like mine; others declared that they would never have recognised it.

I daresay both opinions were correct. The clockwork portion of the phonograph is concealed in the base beneath the statue; the amplifying horn is the shell behind the human figure. Edison's early phonographs recorded onto a thin sheet of metal, normally tinfoilwhich was temporarily wrapped around a helically grooved cylinder mounted on a correspondingly threaded rod supported by plain and threaded bearings.

While the cylinder was rotated and slowly progressed along its axisthe airborne sound vibrated a diaphragm connected to a stylus that indented the foil into the cylinder's groove, thereby recording the vibrations as "hill-and-dale" variations of the depth of the indentation.Free Essay: Three years and a few months ago, I can still recall the memories of being a nursing student, I was studying in a university wherein our.

The phonograph is a device for the mechanical recording and reproduction of rutadeltambor.com its later forms, it is also called a gramophone (as a trademark since , as a generic name in the UK since ) or, since the s, a record player. The sound vibration waveforms are recorded as corresponding physical deviations of a spiral groove engraved, etched, incised, or impressed into the surface.

I have prostate cancer, but I’m happy. Here’s how. By George Monbiot, published in the Guardian 14 th March It came, as these things often do, like a gunshot on a quiet street: shocking and disorienting. Writing a leadership essay is not as complex as it seems. You need to understand who a leader is before you can write about them.

A leader is defined as any individual who has the power to influence, motivate, and even exhort his peers and people in general to achieve their set goals. Disclaimer: This essay has been submitted by a student.

This is not an example of the work written by our professional essay writers. You can view samples of our professional work here.. Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of UK Essays.

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