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First step - Sound waves are converted to electricity with a microphone, there are four major technologies for achieving this
1. Dynamic - the sound waves cause a diaphragm to vibrate, which moves a coil of wire inside a magnetic field. This motion generates a very small electrical wave across the ends of the wire coil.
2. Piezzo
or crystal - Utilises the characteristic of certain crystals to generate electricity when pressure is applied, in this instance the pressure is applied via the vibrating diaphragm.
3. Carbon - Probably the oldest form of microphone which consists of a small canister of carbon granules of the consistency of talcum powder. The diaphragm in this case changes the pressure on the granules which alters the electrical resistance of the microphone. Rather than generate electricity this type of microphone forms part of the circuit of another device (amplifier, radio transmitter, telephone etc.
4. Electret
or Condenser or capacitor - Similar in some respects to the carbon microphone, this version utilises the characteristic
of some dielectric materials to alter the capacitance of the device. Most modern electret
microphones include a small pre-amplifier
so that the output of the microphone appears to generate electricity.
Second Step. - these electrical signals go through various amplifiers, mixers etc and eventually wind up at the modulator. Here the signal is combined with a carrier wave (the frequency to which the radio, TV etc is tuned). There are 2 major forms of modulation.
Amplitude Modulation (AM) where the amplitude (size, height, volume) of the carrier changes with the signal and the frequency of the carrier is unchanged.
Frequency Modulation (FM) where the frequency of the carrier changes with the signal and the amplitude is unchanged
What else can I help you with?
What has to happen to sound wave before they can be transmitted by radiowaves?
Sound waves need to be converted into electrical signals before they can be transmitted by radio waves. This is typically done by using a microphone to capture the sound waves and convert them into electrical signals that can then be modulated onto a radio frequency carrier wave for transmission.
Which is a property of light waves but not sound waves?
why cannot it be both? by definition, amplititude is the extreme range of fluctuating quantity. swing range of a pendulum, current flow,bla,bla,bla. amplitude MODULATION is in reference to radio waves with regards to signal RANGE ie: AM Radio- amplitude modulation am bounces and the range of frequency is modulated within the extreme band withs of the wave.
What kind of wave are sound waves?
Sound waves are longitudinal waves; they travel from side to side, not up and down like transverse waves.
Which is not a type of electromagnetic wave?
Sound waves are not a type of electromagnetic wave. Sound waves are mechanical vibrations that require a medium, such as air or water, to propagate, whereas electromagnetic waves can travel through a vacuum.
Differences between light and sound waves?
The differences between light and sound are as follows:Light can be considered to be made of waves as well as particles. Sound is only a wave. It does not show particle nature.Light waves are electromagnetic waves while sound waves are mechanical waves.Light waves are transverse while sound waves are longitudinal.Light waves can travel in vacuum. Sound waves require a material medium to travel, and hence, cannot travel in vacuum.The speed of light in a medium is constant. The velocity of sound waves can change.In sound waves, the particles of the medium actually oscillate. In a light wave, the electric and magnetic vectors oscillate.Light waves can be polarized, but sound waves cannot.Light waves travel much faster than sound waves. The speed of light is a physical constant. Its value is exactly 299,792,458 metres per second in vacuuum. The speed of sound is 343 metres per second in dry air at 20°C.And finally, a simple one - you can see light while you can hear sound.
What do am radios convert sound into?
AM transmitters convert sound into amplitude modulated radio waves which am radios convert into electrical pulses which speakers convert into air waves that are converted into sound by our eardrum.
What has to happen to sound wave before they can be transmitted by radiowaves?
Sound waves need to be converted into electrical signals before they can be transmitted by radio waves. This is typically done by using a microphone to capture the sound waves and convert them into electrical signals that can then be modulated onto a radio frequency carrier wave for transmission.
Sound quality between AM and FM?
There are two types of modulations. They are amplitude modulation and frequency modulation. In AM, amplitude of the signal is modified. In FM, frequency is getting modulated. Frequency modulated with carrier waves are transmitted and received by receivers without any distortion.
Is Frequency modulated in the light beam of the laser when transfering sound?
Yes it is. That is why you get a scrachy and unclear sound.
Which is a property of light waves but not sound waves?
why cannot it be both? by definition, amplititude is the extreme range of fluctuating quantity. swing range of a pendulum, current flow,bla,bla,bla. amplitude MODULATION is in reference to radio waves with regards to signal RANGE ie: AM Radio- amplitude modulation am bounces and the range of frequency is modulated within the extreme band withs of the wave.
What sound waves do?
Sound waves carry sound
Does sound produce waves?
Yes sound does produce waves. These special waves are called sound waves.
Sound waves are examples of what?
sound waves are a example of mechanical waves
How are sound waves and radio waves alike?
-- both can carry energy from one place to another -- both can be modulated to carry information from one place to another -- technology exists with which both can be generated, detected, and measured -- both can be studied, analyzed, and characterized with the mathematics of wave motion --
What type of waves are sound waves, and are they transverse waves?
Sound waves are longitudinal waves, not transverse waves.
How do electromagnetic waves carry sound as electrical signals?
The electromagnetic wave is "modulated" (changed) to represent the signal. For example, in AM (amplitude modulation), the strength (amplitude) of the wave is increased or decreased, according to the signal.
Do cells phones interfer with wireless microphones?
All communication systems use electromagentic waves which by the law of Superposition of Waves travel independently in any meadium and hence do not interfere but if the frequencies tend to match then the carrier waves with amplitude modulation are more affected and give poor quality sound at the receiving end than the frequency modulated carrier waves.
