Saltar navegación

Activa JavaScript para disfrutar de los vídeos de la Mediateca.

Exposición Física y Química - Contenido educativo

Ajuste de pantalla

El ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:

Subido el 8 de mayo de 2023 por Tic cp juanramonjimenez becerril

157 visualizaciones

Más información Transcripción

Descargar la transcripción

Good morning everyone, my name is Ángel León and today I will talk about the telephone. 00:00:00
The telephone, which was first known as a teletrophone, is a very present invention in our current society. 00:00:04
In fact, it is very useful and many people have both landline and mobile phones. 00:00:10
In fact, thanks to it, we can communicate at a distance and it has also improved our social communication. 00:00:15
But, what is a telephone? 00:00:21
The telephone is a telecommunication device created to transmit acoustic signals by means of electrical signals. 00:00:23
But all this at a distance. 00:00:29
But don't worry because I will explain this later. 00:00:31
The telephone was invented by the Italian Antonio Mucci, 00:00:34
who in 1854 built his first prototype, 00:00:38
although he did not finance his patent due to many financial problems, 00:00:41
and he just presented a brief description of his invention 00:00:44
in the United States Patent Office in 1871. 00:00:48
But how did he realize of this invention? 00:00:53
Because Mucci wanted to build a machine to connect his office, which was on the ground floor of his house, with his bedroom, which was located on the second floor of his house. 00:00:55
And all this because his wife was immobilized by an illness. 00:01:07
And also, this invention was formally patented in 1876 because of these financial problems he had and these by Alexander Graham Bell. 00:01:11
Here you have a picture of the telephone. This is the analog one, because there are two types. 00:01:24
The most important part of this telephone is the telephone receiver, which is going to transform the electricity into sound and then the sound back to electricity. 00:01:30
But how? This is thanks to the microphone, for example. 00:01:40
When you talk, you produce sound waves, and these sound waves make this piece of here, which is called the diaphragm, vibrate. 00:01:45
This is because it's a really thin piece, and then, when it vibrates, this vibration 00:01:55
also makes the other piece, which is the electric microphone, vibrate as well, and as this last 00:02:02
one is connected to the whole telephone, the electricity, by a cooper wire, these vibrations, 00:02:07
these sound waves that you produce, will be converted into electrical vibrations, and 00:02:13
And then, they will pass through an amplification and travelling process by this. 00:02:20
In here, they will be amplified and then they will travel across the microprocessor, with 00:02:26
all the information and the target person will be processed. 00:02:33
And finally, they will pass all through the telephone network by these cables. 00:02:36
And then, the other person will hear what you have just said, and this is thanks to 00:02:42
the sound speaker, which is just the opposite of the microphone. When the 00:02:47
electrical vibration that you have just produced travels across this 00:02:52
spiral of copper wires, because all this is connected by a copper wire, and this 00:02:57
spiral, the current converts it immediately into 00:03:02
an electromagnet. And, as this big piece is a magnet, the small electromagnet will 00:03:07
be constantly attracted and repelled by the big one and as this one is connected 00:03:13
to another diaphragm which is really thin they will vibrate as they are 00:03:18
attracted and repelled by the other and these vibrations they will be converted 00:03:23
into the sound that as all these vibrations are in the same frequency as 00:03:27
you have just talked the other person will hear exactly what you have just 00:03:31
said and talking about how does the telephone network work we can say that 00:03:35
But when you press the buttons, the switch when checking the telephone receiver, you 00:03:42
immediately connect the whole telephone to the telephone network. 00:03:46
So that the microprocessor can process all the information, the target person, etc. 00:03:50
But there is other type of telephone which is quite new, which is the mobile phone, which 00:03:56
is completely different regarding the other. 00:04:01
What you have first to know that when you turn everything that you say, your mobile 00:04:05
phone interprets it as zero and one system. 00:04:10
And the mobile phone immediately transforms it 00:04:13
into electromagnetic waves that the nearby antenna, 00:04:16
depending where you are, will catch 00:04:21
all these electromagnetic waves. 00:04:24
And these ones will be immediately transformed 00:04:27
into pulses of light. 00:04:29
This one will travel to the other antenna 00:04:32
by these optical fiber wires, 00:04:34
which are underground or under the sea. 00:04:37
And then they will travel until the other antenna 00:04:41
where the other person is. 00:04:44
And finally, the pulses of light will be transformed back 00:04:46
into electromagnetic waves, 00:04:49
which will be the signal that the other person will hear. 00:04:51
But you may be asking, 00:04:56
how does my mobile phone know where the other person is? 00:04:58
This is thanks to the MSD. 00:05:01
The MSD is the mobile switch incentive, 00:05:04
and it's where all the mobile phone data is accumulated. 00:05:06
When the pulses of light travel 00:05:11
by these optical fiber wires, 00:05:12
they fairly go to the MST of your data, of where you are. 00:05:15
And then the call request will be sent 00:05:20
to the MST of the other person, 00:05:24
of the data of the other person. 00:05:26
And then the MST of the other person will locate him 00:05:28
and even send the call request by the optical fiber wires, 00:05:31
and then the pulses of light will be transformed 00:05:35
into this signal that the other person will hear. 00:05:38
So in conclusion, the telephone is a really useful invention 00:05:42
that has been developed in a way 00:05:49
that allows better communication for all us. 00:05:50
It is true that the analog telephone 00:05:53
is not as used as in the last century, 00:05:55
but both models, the analog and mobile phone, 00:05:57
are really useful, and thanks to them, 00:05:59
we can communicate with everyone, everywhere. 00:06:02
Thank you for listening. 00:06:05
Subido por:
Tic cp juanramonjimenez becerril
Licencia:
Todos los derechos reservados
Visualizaciones:
157
Fecha:
8 de mayo de 2023 - 18:15
Visibilidad:
Público
Centro:
CP INF-PRI-SEC JUAN RAMON JIMENEZ
Duración:
06′ 10″
Relación de aspecto:
1.82:1
Resolución:
640x352 píxeles
Tamaño:
63.34 MBytes

Del mismo autor…

Ver más del mismo autor

EducaMadrid, Plataforma Educativa de la Comunidad de Madrid

Plataforma Educativa EducaMadrid