Frequencies A sound wave is created as a result of a vibrating object. The object that is vibrating‚ is the source of the disturbance that moves throughout the medium. The object creating the disturbance could be the vocal cords of a person‚ the vibrating strings and soundboard on a string instrument‚ or the vibrating diaphragm of a radio speaker. If an object has the ability to vibrate‚ then it will produce sound. Almost every
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ABSTRACT The study was designed to explore the comparative effectiveness of transmitter of knowledge model and inductive inquiry model on students’ academic achievement. The main objectives of the study were to expose each of the two experimental groups to the transmitter of knowledge model and inductive inquiry model respectively and to compare the effectiveness of these models in the teaching of Social Studies. The pretest posttest control group experimental design was chosen for the experiment
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phase shift keying (BPSK) and shows how this simpler format is modeled using the generic quadrature modulation models. A similar approach is then taken for developing models for multiple phase shift keying (m-PSK)‚ minimum shift keying (MSK)‚ and frequency shift keying (FSK). 9.1 Simulation Issues The tasks of carrier recovery and symbol-clock regeneration‚ which are usually considered part of the demodulation process‚ are an essential part of any data communication system. There are a number
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The Spirit FM and the Joy FM are both non-profit‚ Christian Contemporary radio stations that are broadcasted from the Tampa Bay area. They play everything from the latest hits to the classics‚ and they can make the long drive home after a hard day’s work something to look forward to. Both stations have the same common goal‚ to provide great music for the listener‚ so he or she can have a reliable source of praise and worship. They’re practically identical‚ so why listen to one over the other? The
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are two main types of fibre optic transmitter that are in use today. Both of them are based around semiconductor technology: • Light emitting diodes (LEDs) • Laser diodes Semiconductor optical transmitters have many advantages. They are small‚ convenient‚ and reliable. However‚ the two different types of fibre optic transmitter have very different properties and they tend to be used in widely different applications. LED transmitters These fibre optic transmitters are cheap and reliable. They emit
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Khaleda Hossain with a pen and paper‚ there is an unmistaken spark in his eyes. He has been planning what to write all morning. ‘I am dedicating Habib’s Meye tumi to amar… to my little brother. It’s his birthday on Sunday‚’ says Ranjan smiling. ‘He is back in Sylhet with my father and I hope this makes his day!’ Ranjan’s mother works in Khaleda’s house as a maid. It was Khaleda who introduced Radio FM to him and since then he has dedicated two songs. ‘I waited for my turn and I was so happy to hear
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multiplying the modulated signal by the carrier signal of the same frequency and then using the low pass filter to filter out the remaining frequencies to get the frequency required. In terms of the frequency domain‚ the following figure shows the effect of DSB-SC modulation The effect of the demodulation process in frequency domain: b) AsAccos2πfstcos2πfct=AsAc2(cosfs+fc2πt+cos(fs-fc2πt)) xt=AsAc2cos(ωs+ωct+cos(ωs-ωct))Xω=AsAcπ(δω+ωs+ωc+δω-ωs-ωc)There are two distinct frequencies are (ωs+ωc)
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The Swing by Pierre Renoir The impressionist movement started when Claude Monet and other artists held an exhibition in Paris in 1874. People like Edgar Degas‚ Claude Monet‚ Pierre Renoir‚ Camille Pissaro created their most important work between 1870 to around 1910. The critics gave the exhibition the worst reviews possible. "The critics considered Impressionist paintings an insult to viewers because they were expected to accept apparently unfinished art as a real’ painting." The name was
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The Swing ¡§Inviting¡¨ is the word that comes to mind when I look at the painting The Swing. This masterpiece was Jean-Honore Fragonard¡¦s most famous Rococo piece painted in 1766. The most prominent reason I enjoy this painting is because there is some sort of story line or drama unveiling here. The painting is starring Barton de Saint-Julien and his mistress who is swinging on a twiddled vine looped down from a tree and co-starring is an older gentleman who is left back in the shadows as if
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FM vs AM FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated‚ or altered. With AM radio‚ the amplitude‚ or overall strength‚ of the signal is varied to incorporate the sound information. With FM‚ the frequency (the number of times each second that the current changes direction) of the carrier signal is varied. FM signals have a great advantage over AM signals. Both signals are susceptible to slight changes in amplitude. With an AM broadcast
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