Cutoff frequency

recorded. For the third method, the oscilloscope was next set to produce a 300mV sine wave. The oscilloscope was initially set to produce a very low frequency and amplitude was recorded. Frequency was increased slowly and amplitude was recorded at each interval. Output amplitude was plotted vs frequency. 휏 was calculated using the amplitude and frequency results and equation 3.  휏=½*흅*fc (3) For methods 4 and 5, LabVIEW software was used to record full charge

IMPROVEMENT OF POWER QUALITY USING PQ-THEORY SHUNTACTIVE POWER FILTER B. Udayasri 1 P.A Mohan Rao 2 Dasumanta Kumar Mohanta3 PG Student, MVGR College of Engineering, Vizianagaram, Andhrapradesh,India Assistant Professor of EEE, MVGR College of Engineering, Vizianagaram, Andhrapradesh,India Professor of EEE, MVGR College of Engineering, Vizianagaram, Andhrapradesh,India(Formerly Professor, BITS, Mesra) Abstract: This

cascaded to form a band-pass filter with a gain of 0 dB at center frequency, the critical frequency of the low-pass filter must be ________. a. equal to the critical frequency of the high-pass filter b. less than the critical frequency of the high-pass filter c. greater than the critical frequency of the high-pass filter d. adjusted in a way that Q becomes 10 25. When the gain of a filter is minimum at its center frequency, it is a ________. a. band-pass filter b. band-stop

detection, the peak-to-peak value of microphone voice signal before amplifier is 220mV, while the one after the amplifier is 1.28V. The actual amplifier gain is therefore 5.8 (1.28/0.22), which is very close to the designed value of 5.7. 2.3 Frequency Modification Unit This

Theory and Synthesis Frequency: Frequency means the number of cycles per second and depending on the amount of cycles per second determines how high or low pitched the sound is and the time that it takes to complete one cycle is called the period. Frequency is measured in Hertz (Hz). And An average human is able to hear sounds between 20Hz and 20,000Hz. As the cycles per second increases, the smaller the wavelengths become, therefore there is a higher frequency which will cause the pitch

(TDMA), Frequency Division Multiple Access (FDMA), Code Division Multiple Access (CDMA), and Orthogonal Frequency Division Multiplexing (OFDM). (Goleniewski, L. 2007) Each technique has pros and cons when compared amongst each other. The following is a summary of why each technique has a need, and some of the challenges that come with that technique. Radio Frequency Radio Frequency or RF is used in our everyday lives whether or not you realize it. Some of the common uses of Radio Frequencies are: •

on our daily life because of their use as a form of communication. Radio waves have long wavelengths and have low energy photon particles. Because they have low energy photons, they have lower frequencies when compared to other forms of electromagnetic radiation, such as x- rays that have a higher frequency despite having short wavelengths. Today, radio waves are used as a method to transmit and receive information. Technology that makes use of radio waves includes telephones, television and more

A Look at the Sound of Music As a college student, I have seen innumerable people walking by with their headphones in, using music to block out the rest of the world. With the convenience of an iPhone or other smart phone, listening to music has become so casual. With the press of a button, voila! Miley Cyrus is at the tips of your fingertips. It’s become so normalized that these same people seldom think about the science behind that noise in your ear. A disturbance in space results in a periodic

other defects in products, detection of object and position, ultrasonic mouse, etc [37]. Ultrasonic sound waves are mechanical vibrations that display all of the same features as audible sound waves, only they operate at higher frequencies. Audible sound wave frequencies range between 20 Hz to 20 kHz. In contrast ultrasonic waves range from 20 kHz to 800 MHz, Generally, ultrasonic waves that are used for the testing of materials range from around 0.5 MHz to 20 MHz [38]. Ultrasonic waves are transferred

Ultrasonic: Ultrasonic is science of acoustics dealing with generation and use of inaudible acoustic waves. The sound waves having frequencies ranging above 20KHZ up to several MHZ i.e. human audible ranges are called ultrasonic waves. The sound waves of low frequencies i.e. below human audible range are infrasonic waves. Like life, ultrasonic was originated from sea. The five senses of living beings i.e. hearing, touch, smell, sight and taste are