the waves above is an electrical signal resulting from a sound wave. how does the information in this electrical signal make it to your car radio, it is carried on an FM wave by modulating its frequency,is it carried on an FM wave by its amplitude, is it carried on an FM wave by modulating its waves speed, is it carried on an Fm wave by modulating its engery
he is right but D is C.
1.)A, gamma rays
2.)C, microwaves
3.)B, modulating its frequency
4.)C, 3
Unit 4 lesson 4
1. A. Gamma Ray's
2. C. Microwaves
3. B. Modulate frequency
4. D. 5
Its Frequency.
im right is correct
The information in an electrical signal, resulting from a sound wave, is indeed carried to your car radio using frequency modulation (FM). Here's how it works:
1. Sound Wave Conversion: First, the sound wave is captured by a microphone. The sound wave is an analog signal, meaning it is continuously varying. The electrical signal generated by the microphone represents the sound wave in the form of analog voltage fluctuations.
2. Modulation: The analog electrical signal from the microphone needs to be converted into a format suitable for transmission and reception by the car radio. In FM modulation, the amplitude of the FM carrier wave remains constant, but its frequency is altered.
3. FM Carrier Wave: The FM carrier wave is a high-frequency electromagnetic wave generated by the car radio transmitter. This wave acts as a carrier for the information contained in the audio signal.
4. Frequency Modulation: The audio signal's amplitude modulates the frequency of the FM carrier wave. As the electrical signal's amplitude fluctuates, it causes corresponding variations in the frequency of the carrier wave. The frequency modulation adds or subtracts from the carrier wave's original frequency based on the amplitude of the audio signal.
5. Transmission: The modulated FM carrier wave, containing the audio signal information, is transmitted through the car radio antenna. The antenna sends out electromagnetic waves into the surrounding space.
6. Reception: The car radio's antenna picks up the FM carrier wave signals. Inside the radio, the antenna feeds these signals to the radio's tuner section, which separates the FM carrier wave from other radio signals.
7. Demodulation: In the tuner section of the car radio, the FM carrier wave is demodulated using a process called frequency demodulation. It extracts the audio signal from the carrier wave, by detecting and measuring the variations in its frequency.
8. Amplification and Playback: The demodulated audio signal is then amplified and sent to the car radio's speakers, allowing you to hear the original sound wave that was converted into the electrical signal.
In summary, the information in the electrical signal is carried to your car radio using FM modulation, where the audio signal modifies the frequency of the FM carrier wave. The radio receiver then demodulates the carrier wave to extract the original audio signal, which is then amplified and played back through the speakers.
The signal rides on a higher frequency
called the carrier frequency. The carrier is modulated in the transmitter
and demodulated in the radio. To demodulate means to separate the voice or music from the carrier.
The carrier may be Frequency Modulated
(FM) or Amplitude Modulated(AM). When the carrier is FM, its' frequency is varied by the voice or music that is being transmitted. When the carrier is
AM, its' amplitude is varied by the voice or music that is being transmitted.