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Cable connected landlines, rely on a DC voltage (about 24vdc) when connected on line (receiver lifted).
The microphone (mouthpiece) causes this DC voltage to alter in time with the audio. The receiver is a small loudspeaker, which causes the diaphragm to vibrate as the voltage varies.
How these things are accomplished has changed over the years.
The system that Edison used, and was used up until the 1960's, used a carbon granule microphone and a metal diaphragm earpiece.
The voltage on the line was passed through the microphone, which consisted of carbon granules in a capsule. A tin diaphragm was attached to one end of the capsule. Your voice moved the diaphragm and compressed the carbon, which altered in resistance. As the resistance altered so the voltage varied on the line.
At the other end, the voltage passed through a coil, which attracted a metal diaphragm. As the diaphragm moved, it moved the air near you ear and you could hear what was being said.
It only used two wires, The earpiece and microphone were connected in series.
These days electronics are used. The microphone is an electret condenser microphone, attached to the input of an amplifier. The earpiece is a miniture loudspeaker, attached to the output of an amplifier. The voltage on the line powers the system and also has the audio superimposed on it, via coils and capacitors in the circuit.
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3 How is digital radio different than the types of radio that came before It?
The way the signal is transmitted and processed. FM radios are transmitted via signal generators and amplifiers on the ground while digital radio like Sirius or AM are transmitted via satellites. The digital signals are sent in packets vs. lower frequency radio waves.
What are weighted piano keys?
Weighted piano keys are the keys that you can hit softly or hard and that will make the dynamics of a piece of music. This is so that you can make loud and soft sounds. Most keyboards don't have weighted piano keys and so you can only adjust the sound via the volume and the sound of the voice via the on-board computer screen.
Do some TVs use radio waves?
TVs receiving broadcast programming do, they just use it to produce both picture and sound; instead of just sound as an ordinary radio does. TVs receiving cable programming don't. TVs receiving satellite programming do, but the radio waves are in the microwave band transmitted from the satellite and received by your dish, where they are down converted via a microwave superheterodyne stage in the dish so that they are in the frequency range the TV can handle.
What is vibrating on a keyboard to cause sound?
The acoustic keyboard has a serious of hammers that hit strings causing vibrations that make sound. Electric keyboards generate identical sounds via electrical waves.
What is the name or artist for this song from late 90s to early 00s sung by a boy band with lyrics about being the last to know about a girl cheating and hearing about it via telephone?
The song is "The Last To Know" by Del Amitri.
How id sound transmitted and received via telephone?
ask graham alexander bell he invented it
How is sound transmitted and received via telegraph?
Sound is transmitted via telegraph by converting sound waves into electrical signals. These electrical signals are then sent through a telegraph wire to a receiver on the other end. The receiver converts the electrical signals back into sound waves, allowing the message to be heard.
What are memos and invoices and faxes?
A memo is a note to an individual or a group, an invoice is a bill and a fax is a document that is transmitted by a fax machine via the telephone connection.
How is telephone triage conducted?
Via telephone
In terms of energy transfers and transformations How is sound transmitted and received by telephone?
If we deal with a modern digital telephone, this is what happens. 1) When you speak you cause vibrations (sound) in the air. 2) These vibrations move a magnet in an coil found in the telephones microphone. 3) This movement of the microphone generates electricity. 4) The electrical oscillations are converted into numbers which describe them via an analogue to digital converter. 5) The number stream is sent over the telephone wire or (carrier wave with a cell phone) through all the exchanges to the telephone you are calling. 6) In the receiving telephone the number stream is converted back into electrical oscillations by an digital to analogue converter. 7) The electrical oscillations are fed into a coil in which sits a magnet (and cone)- called the speaker. 8) The magnet moves in response to the electricity in the coil and causes the cone to vibrate the air. 9) The person on the phone hears the vibrations in their ear as sound.
How does sound travel from instruments to your ears?
Sound creates waves in a material- compression waves. These waves are transmitted through the atoms/molecules in the material to the receiver. The denser a material is, the more effectively sound may travel; this is because the sound waves are transmitted more easily through the tightly packed molecules.
How does sound is transmitted to the brain?
Sound waves enter the ear and travel through the ear canal to the eardrum, causing it to vibrate. The vibrations are transmitted through the middle ear bones to the cochlea in the inner ear. Sensory hair cells in the cochlea convert these vibrations into electrical signals that are transmitted to the brain via the auditory nerve.
How is sound transmitted through the ear and processed by the brain?
Sound is transmitted through the ear when sound waves enter the ear canal and vibrate the eardrum. The vibrations are then passed through the middle ear bones to the cochlea in the inner ear, where they are converted into electrical signals. These signals are sent to the brain via the auditory nerve, where they are processed and interpreted as sound.
Aids can be transmitted breast milk?
HIV can be transmitted via breast milk.
How does the sound travel through telephones?
It isn't - at least, not as a sound. What is transmitted is a signal. The sound is converted into electrical signals; those are transmitted. On the receiving end, the electrical signals are converted back to sound.
What are the release dates for Via Telephone - 1916?
Via Telephone - 1916 was released on: USA: 20 August 1916
Can you get aids before puberty?
Yes, it is transmitted via bodily fluids, so it can still be transmitted sexual but also via needles, blood transfusions etc
