0
noise is a ac signal(high frequency range), as LPF allows only lower frequencies integrator is has more noise immunity than differentiator
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What is a balanced mic?
A balanced mic is based on a balanced connection offering better rejection to outside noise by a phenomenon known as CMR, common mode rejection. For example, audio is AC at any moment at any single place on a twisted pair balanced cable, the audio is both +5 and - 5 V. If external noise is inducted on to the cable at, say +1 V, that +1 V is added to the + 5 and the - 5. As an arithmetic trick of elementary electronics, the noise is cancelled out inside the circuitry of the next stag In other words, a balanced mic helps to elimate noise balancing the audio output. Unbalanced means it has less power, meaning it may produce more erroneous noise. http://forums.creativecow.net/readpost/30/857322
Can people over 40 hear dog whistles?
As a person grows older, their hearing usually becomes worse, and they have a more difficult time hearing high frequency sounds. There is no relation to a specific age as this inability to hear high frequency sounds is affected by the kinds of sounds that a person's hearing is subjected to. Hearing damage is greatly increased by loud noises and loud music. Hearing damage can also cause a person to hear noise that is not actually there. This type of damage is called 'tinnitus'. It can sound like a ringing in the ears that never goes away, and is most noticeable when in a quiet room. Hearing protection should be used to prevent hearing loss and tinnitus from loud noises and loud music. There are several ways to reduce hearing damage. -Reduce the level of the noise -Reduce the amount of time that you are exposed to the noise -Use hearing protection to reduce the loudness of the noise -Increase your distance away from the noise
If a binary signal is sent over a 3-kHz channel whose signal-to-niose ration is 20dB what is the maximum achievable data rate?
The Nyquist Limit can be disregarded as this is not a noiseless channel (faster signal = more noise, this channel's s/n ratio is provided as 20dB)thus we use Shannon's result which says the maximum data rate of a noisy channel is X = H Log2 (1 + S/N) bps using 10Log10 S/N as our standard quality2 = Log10 S/N --> S/N = 102 --> S/N = 100X = 3000 Log2 (1 + 100) bps which gives you x = 19,974.63bps as your final answer.~ Mike------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ALTERNATIVE APPROACHThe formula -Shannon Capacity = Bandwidth * log2 ( 1 + Signal Power / Noise Power )gets approximated to -Shannon Capacity = Bandwidth * ( Signal to Noise ratio in dB ) / 3assuming the fact that ....Signal to Noise ratio in dB = 10 log10 ( Signal Power /Noise Power )and also assuming1 is much much less than Signal Power/Noise PowerSo in the present case the approximate answer works out toShannon Capacity = Bandwidth * ( Signal to Noise ratio in dB ) / 3 ...= 3KHz * 20 dB / 3= 3 * 103 * 20 / 3 bits per second= 20000 bits per second~ANIRUDDHA GHOSHJADAVPUR UNIVERSITYBSc Mathematics - 2004 - 2010MCA - 2007 - 2010~
Describe four type of noiseWhich is likely to pose the greatest problem to network managers?
The following list summarizes the major sources of error. The first six are the most important; the last three are more common in analog rather that digital circuits. Line outages are a catastrophic cause of errors and incomplete transmission. Occasionally, a communication circuit fails for a brief period. This type of failure may be caused by faulty telephone end office equipment, storms, loss of the carrier signal, and any other failure that causes a short circuit. When constructing and designing redundant networks that are fault survivable, this is usually called designing for the "farmer with a back hoe" problem. White noise or gaussian noise (the familiar background hiss or static on radios and telephones) is caused by the thermal agitation of electrons and therefore is inescapable. Even if the equipment was perfect and the wires were perfectly insulated from any and all external interference, there still would be some white noise. White noise usually is not a problem unless it becomes so strong that it obliterates the transmission. In this case, the strength of the electrical signal is increased so it overpowers the white noise; in technical terms, we increase the signal to noise ratio. Impulse noise (sometimes called spikes) is the primary source of errors in data communications. Some of the sources of impulse noise are voltage changes in adjacent lines, lightning flashes during thunderstorms, fluorescent lights, and poor connections in circuits. Cross-talk occurs when one circuit picks up signals in another. It occurs between pairs of wires that are carrying separate signals, in multiplexed links carrying many discrete signals, or in microwave links in which one antenna picks up a minute reflection from another antenna. Cross-talk between lines increases with increased communication distance, increased proximity of the two wires, increased signal strength, and higher frequency signals. Wet or damp weather can also increase cross-talk. Like white noise, cross-talk has such a low signal strength that it normally is not bothersome. Echoes can cause errors. Echoes are caused by poor connections that cause the signal to reflect back to the transmitting equipment. If the strength of the echo is strong enough to be detected, it causes errors. Echoes, like cross-talk and white noise, have such a low signal strength that they normally are not bothersome. In networks, echo suppressors are devices that reduce the potential for this type of error. Echoes can also occur in fiber optic cables when connections between cables are not properly aligned. Attenuation is the loss of power a signal suffers as it travels from the transmitting computer to the receiving computer. Some power is absorbed by the medium or is lost before it reaches the receiver. This power loss is a function of the transmission method and circuit medium. High frequencies lose power more rapidly than low frequencies during transmission, so the received signal can thus be distorted by unequal loss of its component frequencies. Attenuation increases as frequency increases or as the diameter of the wire decreases, or as the distance of the transmission increases. Repeaters can be used in a digital environment to correct for attenuation due to distance, where amplifiers can be used to boost diminishing or attenuating analog signals over longer distances. A repeater will perfectly replicate the incoming, distorted digital signal and send it on deeper into the network as if new. An amplifier will boost an attenuating analog signal, but also boost the error noise in the signal as it does so. Fewer repeaters are necessary as compared to amplifiers to correct for attenuation, thus helping to make digital more cost effective when compared to analog transmission in controlling for noise. Intermodulation noise is a special type of cross-talk. The signals from two circuits combine to form a new signal that falls into a frequency band reserved for another signal. On a multiplexed line, many different signals are amplified together, and slight variations in the adjustment of the equipment can cause intermodulation noise. A maladjusted modem may transmit a strong frequency tone when not transmitting data, thus producing this type of noise. Jitter may affect the accuracy of the data being transmitted because minute variations in amplitude, phase, and frequency always occur. The generation of a pure carrier signal in an analog circuit is impossible. The signal may be impaired by continuous and rapid gain and/or phase changes. This jitter may be random or periodic. Harmonic distortion usually is caused by an amplifier on a circuit that does not correctly represent its output with what was delivered to it on the input side. Phase hits are short-term shifts "out of phase," with the possibility of a shift back into phase.
Advantage of digital signal?
Higher immunity to noise, storage of digital signal is cheap and easy, its representation is only using two levels as opposed to infinite levels for analog
Why are the transfer characteristics of a differentiator and an integrator a circle when the input is a sine wave?
It has to do with the fact that what's being plotted isn't a simple function, y = f(x), on an x-y grid, but rather a set of parametric equations plotted on a f(t)-g(t) grid where: x = f(t) is your input, and y = g(t) is your output. Specifically, for the differentiator: x = f(t) y = df/dt. For the integrator: x = f(t) y = ∫ f(t) dt. So, if your input is x = f(t) = sin(t), then your two outputs will be df/dt = cos(t) and ∫ sin(t) dt = -cos(t). That means your coordinate axes for the differentiator and the integrator will be the parametric equations x = sin(t), y = cos(t) and x = sin(t), y = -cos(t), respectively. I don't know if you've ever worked with parametric equations before, but suffice it to say, both of those sets of equations are parametric equations for a circle. I'll add a link to parametric equations below if you want to learn more.
Where can one find information about system integrator?
A system integrator is the valve that opens and shuts in your hot water tank. It allows the flow of hot water to your pipes. Your hardware store has more information I would assume.
Slogans on noise pollution?
the more you make noise the more you lose your voice
Why integrators are more preferred than differentiator in analog computers?
integrators are more linear than the differentiators and the integrators reduce the power consumption than the high pass filter
How does population cause noise pollution?
because the more people the more noise
Does SUV's make more noise than a car?
no suv's do not make more noise than a car
What generates more noise ac motor or dc motor?
dc motors generate more noise.
Why does PA with microphone plugged in make high-pitched feedback?
Loudspeakers bring amplified noise, going to the microphones that are amplified to bring more noise from the loudspeakers, going to the microphones that are amplified to bring more noise from the loudspeakers, going to the microphones that are amplified to bring more noise from the loudspeakers, going to the microphones that are amplified to bring more noise from the loudspeakers...
Whats wrong with your car if it makes a rattling noise when idle?
Depends on where the noise is whats making the noise. Can you be more descriptive of where and what?
What are the Slogans related to stop noise pollution?
the more you make NOISE the faster you lose your VOICE
What is port noise?
Port noise is when air gets into and moves through a port on a speaker in a car. Port noise happens more often with Subwoofers because they have more airflow than a regular speaker.
Which makes more noise a guinea pig or a hamster?
A Ginnie pig makes SO much more noise than a hamster. Get a hamster they dont make a lot of noise and their so cuddley and cute!
