This video demonstrates how to construct a working model of Alexander Graham Bell's first telephone. This phone was constructed in 1876 and supported Bell's successful patent application for the first telephone.
@@putnik805 add salt to water and it will be more conductive or add hydrochloric acid not too much, but use it in open area because you will produce chlorine gas
When I tried building this, I needed to add salt to the vinegar in order for it to work. Furthermore, the signal is so strong, I can hear the message very clearly!
Hello kind sir. I am wondering if there could be interference with this device: The microphone picking up the sounds the speakers make which auto amplifies.. ?
@@putnik805 You should have an ionic solution in order for the current to be run through. Drinking water is a poor electrolyte since it contains little to no dissolved compounds. A table salt solution will work fine, but keep in mind that running current through it will cause it to release toxic chlorine and explosive hydrogen gas. In my opinion, the best choice would be a non-active metal sulfate, such as copper (II) sulfate. It won't release any toxic compounds in the air.
I'm in a rabbit hole now, really trying to educate myself on things we take for granted because we're born into an era that already has everything invented and perfected, not really needing to understand the principles behind them! This is soooo cool! As an African American woman in my 20s, I want to acquire and understand these everyday things. So grateful for this video and the eloquent, detailed, easy-to-understand set-up of it. Thank you for posting!
We must understand the primitiveness of all this. The light-bulb was not even available yet. Speakers and Microphones, and amplifiers were not available or thought of yet, and the record/recording machine was only being considered about this time. So in a way, Bell also invented the first speaker and microphone. It took quite some time about 50 years, till we have the coil/magnet speakers and microphones of today.
Sir you always rock, all of us learn a lot of Physics concepts from your excellent videos. In only 10 minutes duration video, you teach us all those excellent concepts, which our University Teachers can't teach us in a 4-years Bachelors Degree program. Sir may you always live happy, healthy, wealthy, respected life with your family and friends. We always love you Sir.
With all our pre knowledge and advanced technology, this is obviously still difficult to pull off for the average person. You.even needed to use a tester which Graham Bell didnt have. And it's still a challenge. *THIS PROVES ALEXANDER GRAHAM BELL WAS A GENIOUS!!!!!!!*
Dude they were way beyond genius. It's hard to even imagine the level of creativity, faith and determination. Beyond way beyond genius. Smart smart smart people weren't even close to close as genius as these guys.
Woah! That's so cool! I'm definitely going to try making one of these. Never would have thought the principle behind the first phone was so simple. I'm a bit curious how it would have sounded if, instead of a speaker, you used the electromagnet with the metal switch(is it like a relay? )
I love all the things in this videos, including the music...gives you the feeling as you are about to make a discovery... (as it's actually gonna happen :-) )
You could use this as a microphone. I can just imagine that a person is online playing a game and uses this to talk, it would have to be amplified a lot though to make it understandable, but still proof of concept
I have a book from 1888 called "the farm and household cyclopædia" in the book there's instructions for a telephone. Here they are To Make a Cheap Telephone. Take a wooden tooth-powder box and make a hole of about the size of a half crown in the lid and the bottom. Take a disk of tinned iron, such as can be had from a preserved meat tin, and place it on the outside of the bottom of the box, and fix the cover on the other side of it. Then take a small bar-magnet, place on one end a small cotton or silk reel, and round the reel wind some iron wire, leaving the ends loose. Fix one end of the magnet near, as near as possible without touching, to the disk, and then one part of the telephone is complete. A similar arrangement is needed for the other end. With this one can converse at a distance of about 100 yards
The inventor of the telephone was invented by the German Johann Phillip Reis who built his telephone in 1859. The first sentence was (translated) “The horse doesn’t eat cucumber salad”. In 1861 he gave a new model of his invention the name “Telephon”.
I noticed a bit of interference in this video's audio and recognized it as a cell phone. As a guitar player, I've heard that many times when my phone was too close to the guitar pickups. I found it a bit ironic, since it's a video about the telephone.
My Major question is why the wire W from brass rod to suspended membrane wire connected ? You haven't did the same in your experiment also. It might be a Wave W - Hope not Wire "W". Please explain
Okay this was a great video with one possible element of confusion. You mentioned that when the Wire W vibrates it creates a varying resistance. I would explain it a bit differently. The Wire W is cutting through the magnetic field of the circuit. Hence, it is causing a fluctuation of the current. Since a metal object moving through a magnetic field produces it's own current. The fluctuating current then goes on to produce sound through the receiver as you explained. I do not see how varying resistance came into this. You are not limiting the current. You are merely breaking the magnetic field with a metallic object. Please anyone, feel free to correct me if I am wrong here.
ANTONIO MEUCCI was The Original Inventor of the Telephone Alexander Bell was only 2 years old when when Meucci invented the telephone. Alexander bell was the first person to patent the telephone Meucci sued, and the court case drew considerable public sympathy for the poor Italian immigrant who could barely speak English. But the judge ruled in favour of Bell.
I don't see why the water thing was necessary. I thought in microphones the coil and magnet combination just moves up and down in ways respective to the amplitude and frequency of the sound waves that hit the diaphragm that the coil connects to. Why water?
That wasn't water, it was vinegar which is about 4-8% acetic acid; an electrolyte solution that allows the flow of electricity. The motion of the metal rod causes a change in current flow, thus changing the amount of current reaching the receiving electromagnet (speakers). This causes the vibration of the magnets in the speakers to be in sync with the input sound waves, effectively transferring sound from one location to another via electricity.
can you please tell me how a wire can carry actual human sound wave? I just can't get my head around how sound of a human can be transmitted through a wire.
Human voice, and all sounds, are waves of compressions of air molecules (vibrating at hundreds or thousands of times per second) that travel through the air. The diaphragm and wire are moved up and down from these air compressions. The wire just barely in the liquid and the battery form a "pressure valve" for electrons flowing through the wire. The wire moving in and out of the liquid is like a rapidly adjusted valve (a "variable resistor") controlling the number of electrons traveling though the wire (the "current"). When the wire dips further into the vinegar, this valve (the "resistance") is opened up so more electrons can flow. The pattern of elections flowing (the "current waveform") is now varying with the same pattern as the air waves are (the sounds). The speaker then turns this varying current back into sound waves by an electromagnet (whose strength of magnet force changes depending on how much current is flowing though it) that pushes and pulls a paper cone in the same wave pattern as the current (and the original sound) has, so the sound is reproduced at the speaker.
@@MrA2intl thank you very much. Your explaining how the sound wave is transmitted was actually what I wanted to understand. Very clearly expressed and thereby easy to understand.
i was trying to make a wireless one!! is it possible?😅😅 in which sound wave is converted to mechanical wave then a reciever which convert electric wave to sound wave!! also trying to make two way😅😅 pls help me!!
Some say a Mr. Gray invented the telephone, and Bell looked at Mr. Gray's "caveat", which was basically a place holder one submits to the U.S. Patent Office, after which time one has a year to submit final patent application. Bell looked at Gray's caveat and then within a couple of weeks he changed his design and made his telephone work. It was known at the time this was happening and there were many court cases about it. Bell started dating a prominent politician and judge's daughter who also had ties and influence at the U.S. Patent Office. He listened to Bell's idea and set up an appointment for him to view Gray's caveat. The Patent clerk was a drunk, owed this man's friend money, and testified that Bell had given him a $100 bill to look at the caveat.
I tried to build the same phone, I used plastic paper and a 9.5 volt battery but I have no signal. please can you help me this is for a school project and it would be super interesting for me to build one that works.
Meucci discovered the voice transmission in 1849 and between 1858 and 1860 he built an almost perfect phone model . The generator was invented in 1888 ..... Studying a little more ........
Phone ringing Fud: Sorry wrong number Holly: how’s it going honey Fud: what are you doing now I thought it was the wrong number Holly : i’m sorry but it’s not a wrong number so what are you cooking today? Fud: i’m cooking fish rice casserole
